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Flow of Control – NCERT Class 11 Computer Science Chapter 6 – Conditional and Looping Constructs in Python

Explains how Python manages the order of execution of statements using control structures. Covers conditional statements (if, if-else, if-elif), indentation rules, and looping constructs (for and while). Introduces range() function, nested loops, and the use of break and continue statements with various examples. Highlights flowcharts, iteration logic, and pattern generation for better understanding of program control flow.

Updated: 9 months ago

Categories: NCERT, Class XI, Computer Science, Python, Flow of Control, Conditional Statements, Looping, Chapter 6

Tags: Flow of Control, Conditional Statements, If Else, Elif, Loops, For Loop, While Loop, Range Function, Break Statement, Continue Statement, Nested Loops, Indentation, Decision Making, Iteration, NCERT Class 11, Computer Science, Chapter 6

Flow of Control: NCERT Class 11 Chapter 6 - Enhanced Study Guide, Precise Notes, Diagrams & Quiz 2025

Enhanced Full Chapter Summary & Precise Notes from NCERT PDF (22 Pages)

Overview & Key Concepts

Exact Definition: "The order of execution of the statements in a program is known as flow of control. The flow of control can be implemented using control structures. Python supports two types of control structures—selection and repetition."

Introduction: Sequence from Ch 5; Bus analogy (Fig 6.1); Quote: G. van Rossum on indentation.
Chapter Structure: Selection (if/else/elif), Indentation, Repetition (for/while), Break/Continue, Nested Loops.
2025 Relevance: Control in AI loops (e.g., TensorFlow training); Indentation in VS Code; Nested for data processing.

6.1 Introduction to Flow of Control

Precise: Sequential execution; Control structures: Selection/Repetition. Expanded: Program 6-1 (difference); Flow like bus route.

Precise Fig 6.1: Bus to School (SVG)

Program 6-1: Difference of Two Numbers

#Program 6-1
#Program to print the difference of two input numbers
num1 = int(input("Enter first number: "))
num2 = int(input("Enter second number: "))
diff = num1 - num2
print("The difference of",num1,"and",num2,"is",diff)

Output:
Enter first number 5
Enter second number 7
The difference of 5 and 7 is -2

6.2 Selection

Precise: Decision making (if/else/elif); Positive difference (Prog 6-2); Flowchart Fig 6.2. Expanded: Nested if in calculator (Prog 6-3).

Precise Fig 6.2: Decision Flowchart (SVG)

Program 6-2: Positive Difference

#Program 6-2
#Program to print the positive difference of two numbers
num1 = int(input("Enter first number: "))
num2 = int(input("Enter second number: "))
if num1 > num2:
     diff = num1 - num2
else:
     diff = num2 - num1
print("The difference of",num1,"and",num2,"is",diff)

Output:
Enter first number: 5
Enter second number: 6
The difference of 5 and 6 is 1

Program 6-3: Simple Calculator

#Program to create a four function calculator
result = 0
val1 = float(input("Enter value 1: "))
val2 = float(input("Enter value 2: "))
op = input("Enter any one of the operator (+,-,*,/): ")
if op == "+":
    result = val1 + val2
elif op == "-":
    if val1 > val2:
        result = val1 - val2
    else:
        result = val2 - val1
elif op == "*":
        result = val1 * val2
elif op == "/":
    if val2 == 0:
        print("Error! Division by zero is not allowed. Program terminated")
    else:
        result = val1/val2
else:
    print("Wrong input,program terminated")
print("The result is ",result)

Output:
Enter value 1: 84
Enter value 2: 4
Enter any one of the operator (+,-,*,/): /
The result is 21.0

Example 6.1: if Syntax

age = int(input("Enter your age "))
if age >= 18:
    print("Eligible to vote")

Example 6.2: if-elif-else (Positive/Negative/Zero)

number = int(input("Enter a number: "))
if number > 0:
     print("Number is positive")
elif number < 0:
     print("Number is negative")
else:
     print("Number is zero")

Example 6.3: Traffic Signal

signal = input("Enter the colour: ")
if signal == "red" or signal == "RED":                
     print("STOP")
elif signal == "orange" or signal == "ORANGE":    
     print("Be Slow")
elif signal == "green" or signal == "GREEN":          
     print("Go!")

6.3 Indentation

Precise: Whitespace for blocks; Strict check; Single tab common. Expanded: Prog 6-4 shows blocks.

Program 6-4: Larger of Two Numbers

#Program 6-4
#Program to find larger of the two numbers
num1 = 5
num2 = 6
if num1 > num2:         
     #Block1
     print("first number is larger")         
     print("Bye")
else:   
     #Block2
     print("second number is larger")   
     print("Bye Bye")

Output:
second number is larger
Bye Bye

6.4 Repetition

Precise: Loops for iteration; Butterfly cycle (Fig 6.3); For/While. Expanded: Prog 6-5 (sequence); Range() function.

Precise Fig 6.3: Iterative Process (SVG)

Program 6-5: First Five Natural Numbers

#Program 6-5
#Print first five natural numbers
print(1)
print(2)
print(3)
print(4)
print(5)

Output:
1
2
3
4
5

Program 6-6: Print 'PYTHON' Characters

#Program 6-6
#Print the characters in word PYTHON using for loop
for letter in 'PYTHON':
     print(letter)

Output:
P
Y
T
H
O
N

Program 6-7: Print Sequence [10,20,30,40,50]

#Program 6-7
#Print the given sequence of numbers using for loop
count = [10,20,30,40,50]
for num in count:
     print(num)

Output:
10
20
30
40
50

Program 6-8: Even Numbers

#Program 6-8
#Print even numbers in the given sequence
numbers = [1,2,3,4,5,6,7,8,9,10]
for num in numbers:
     if (num % 2) == 0:
          print(num,'is an even Number')

Output:
2 is an even Number
4 is an even Number
6 is an even Number
8 is an even Number
10 is an even Number

Example 6.4: range() Function

>>> list(range(10)) 
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> list(range(2, 10))  
[2, 3, 4, 5, 6, 7, 8, 9]       
>>> list(range(0, 30, 5))  
[0, 5, 10, 15, 20, 25]   
>>> list (range (0, -9, -1))  
[0, -1, -2, -3, -4, -5, -6, -7, -8]

Program 6-9: Multiples of 10

#Program 6-9
#Print multiples of 10 for numbers in a given range
for num in range(5):
     if num > 0:
          print(num * 10)

Output:
10
20
30
40

Precise Fig 6.4: For Loop Flowchart (SVG)

Program 6-10: First 5 Natural (While)

#Program 6-10
#Print first 5 natural numbers using while loop
count = 1
while count <= 5:
     print(count)
     count += 1

Output:
1
2
3
4
5

Program 6-11: Factors of Number

#Program 6-11
#Find the factors of a number using while loop
num = int(input("Enter a number to find its factor: "))
print (1, end=' ')   #1 is a factor of every number
factor = 2  
while factor <= num/2 :
     if num % factor == 0:
          print(factor, end=' ') 
     factor += 1
print (num, end=' ') #every number is a factor of itself

Output:
Enter a number to find its factors : 6
1 2 3 6

Precise Fig 6.5: While Loop Flowchart (SVG)

6.5 Break and Continue

Precise: Break: Exit loop; Continue: Skip iteration. Expanded: Prog 6-12 (break at 8); Prog 6-13 (sum positives); Prog 6-14 (prime check).

Precise Fig 6.6: Break Flowchart (SVG)

Program 6-12: Break Demo

#Program 6-12
#Program to demonstrate the use of break statement in loop
num = 0
for num in range(10):
     num = num + 1
     if num == 8:
          break
     print('Num has value ' + str(num))
print('Encountered break!! Out of loop')

Output:
Num has value 1
Num has value 2
Num has value 3
Num has value 4
Num has value 5
Num has value 6
Num has value 7
Encountered break!! Out of loop

Program 6-13: Sum Positives

#Program 6-13
#Find the sum of all the positive numbers entered by the user 
#till the user enters a negative number. 
entry = 0
sum1 = 0
print("Enter numbers to find their sum, negative number ends the loop:")
while True: 
     entry = int(input())
     if (entry < 0):
          break
     sum1 += entry
print("Sum =", sum1)

Output:
Enter numbers to find their sum, negative number ends the loop:
3
4
5
-1
Sum = 12

Program 6-14: Prime Check

#Program 6-14
#Write a Python program to check if a given number is prime or not.
num = int(input("Enter the number to be checked: "))
flag = 0       
 
if num > 1 :
     for i in range(2, int(num / 2)):
          if (num % i == 0):
               flag = 1     
               break       

     if flag == 1:
          print(num , "is not a prime number")
     else:
          print(num , "is a prime number")
else :
          print("Entered number is <= 1, execute again!")

Output 1:
Enter the number to be checked: 20
20 is not a prime number
Output 2:
Enter the number to check: 19
19 is a prime number

Precise Fig 6.7: Continue Flowchart (SVG)

Program 6-15: Continue Demo

#Program 6-15
#Prints values from 0 to 6 except 3
num = 0
for num in range(6):
     num = num + 1
     if num == 3:
          continue
     print('Num has value ' + str(num))
print('End of loop')

Output:
Num has value 1
Num has value 2
Num has value 4
Num has value 5
Num has value 6
End of loop

6.6 Nested Loops

Precise: Loop inside loop; No limit on levels. Expanded: Prog 6-16 (nested for); Prog 6-17 (pattern); Prog 6-18 (primes 2-50); Prog 6-19 (factorial).

Program 6-16: Nested For

#Program 6-16
#Demonstrate working of nested for loops
for var1 in range(3):
    print( "Iteration " + str(var1 + 1) + " of outer loop")
    for var2 in range(2):    #nested loop
        print(var2 + 1)
    print("Out of inner loop")
print("Out of outer loop")

Output:
Iteration 1 of outer loop
1
2
Out of inner loop
Iteration 2 of outer loop
1
2
Out of inner loop
Iteration 3 of outer loop
1
2
Out of inner loop
Out of outer loop

Program 6-17: Pattern

#Program 6-17
#Program to print the pattern for a number input by the user
num = int(input("Enter a number to generate its pattern = "))
for i in range(1,num + 1):
     for j in range(1,i + 1):
          print(j, end = " ")
     print()

Output:
Enter a number to generate its pattern = 5
1
1 2
1 2 3
1 2 3 4
1 2 3 4 5

Program 6-18: Primes 2-50

#Program 6-18
#Use of nested loops to find the prime numbers between 2 to 50
num = 2
for i in range(2, 50):
     j= 2
     while ( j <= (i/2)):
          if (i % j == 0):     
               break           
          j += 1
     if ( j > i/j) :           
          print ( i, "is a prime number")
print ("Bye Bye!!")

Output:
2 is a prime number
3 is a prime number
5 is a prime number
7 is a prime number
11 is a prime number
13 is a prime number
17 is a prime number
19 is a prime number
23 is a prime number
29 is a prime number
31 is a prime number
37 is a prime number
41 is a prime number
43 is a prime number
47 is a prime number
Bye Bye!!

Program 6-19: Factorial

#Program 6-19
#The following program uses a for loop nested inside an if..else 
#block to calculate the factorial of a given number
num = int(input("Enter a number: "))
fact = 1
# check if the number is negative, positive or zero
if num < 0:
    print("Sorry, factorial does not exist for negative numbers")
elif num == 0:
    print("The factorial of 0 is 1")
else:
    for i in range(1, num + 1): 
        fact = fact * i
    print("factorial of ", num, " is ", fact)

Output:
Enter a number: 5
Factorial of 5 is 120

Enhanced Features (2025)

Full PDF integration, expanded programs (6-1 to 6-19), SVGs (Figs 6.1-6.7), detailed tables/examples, 30 Q&A updated, 10-Q quiz. Focus: Hands-on control flow.

Exam Tips

Write programs (positive diff/prime/pattern); Explain syntax/flowcharts; Differentiate for/while; Use break/continue in code; Nested loop examples.

30 Questions & Answers - NCERT Precise (Updated with Full Chapter)

Expanded: 10 (1-mark), 10 (4-marks), 10 (8-marks) based on full chapter; Mark-based with precise lines.

1-Mark Questions (10 Questions, One-Line Answers)

Q1: What is flow of control?

Ans: Order of statement execution.

Q2: Types of control structures?

Ans: Selection and repetition.

Q3: Syntax for if?

Ans: if condition: statements.

Q4: Purpose of elif?

Ans: Chain multiple conditions.

Q5: Indentation uses?

Ans: Define code blocks.

Q6: For loop iterates over?

Ans: Sequence or range.

Q7: While loop condition checked?

Ans: Before body execution.

Q8: Break does what?

Ans: Exits the loop.

Q9: Continue skips?

Ans: Rest of current iteration.

Q10: Nested loop is?

Ans: Loop inside another loop.

4-Mark Questions (10 Questions, Five-Line Answers)

Q11: Explain selection with syntax.

Ans: Decision making; if: condition true execute block. if-else: Two paths. if-elif-else: Multiple alternatives. Nested for sub-conditions (Prog 6-3). Fig 6.2 flowchart.

Q12: Differentiate for and while.

Ans: For: Known iterations, over sequence/range. While: Condition-based, test first. For: Exhausts items. While: Update to avoid infinite. Progs 6-6/6-10.

Q13: Describe indentation rules.

Ans: Whitespace (tab/spaces) for blocks; Same level groups statements. Strict syntax errors. Common: 1 tab/level. Prog 6-4 example.

Q14: Explain range() function.

Ans: range(start, stop, step); Integers sequence excluding stop. Default start=0, step=1. Positive/negative step. Ex 6.4 examples; Used in for loops.

Q15: Purpose of break/continue.

Ans: Break: Terminate loop early. Continue: Skip to next iteration. Flexibility in flow. Progs 6-12/6-15. Figs 6.6/6.7.

Q16: Nested loops application.

Ans: Inner repeats per outer; Patterns/primes/factorial. Prog 6-17 (triangle); No nesting limit. Mix for/while.

Q17: Infinite loop issue.

Ans: Condition never false; Logical error. Ensure update (count +=1). While without increment example.

Q18: Positive difference program.

Ans: if num1 > num2: diff=num1-num2 else: diff=num2-num1. Prog 6-2; Always absolute value.

Q19: Prime number check.

Ans: For i in 2 to num/2: if divisible break. Flag=1 not prime. Prog 6-14; Outputs for 20/19/2/1.

Q20: Pattern printing.

Ans: Nested for: Outer rows, inner columns. Prog 6-17; 1 to n triangle.

8-Mark Questions (10 Questions, Ten-Line Answers)

Q21: Explain introduction and selection.

Ans: Sequence to control; Selection for decisions (pen/path). if/else/elif syntax/examples (Ex 6.1-6.3). Prog 6-2 positive diff. Nested in calculator (Prog 6-3). Flowchart Fig 6.2. Van Rossum quote.

Q22: Detail indentation and repetition intro.

Ans: Indentation: Blocks without braces; Strict. Prog 6-4. Repetition: Iteration like bills/butterfly (Fig 6.3). Avoid 100k prints; Logic: Init-print-increment. Prog 6-5 sequence.

Q23: Describe for loop with range.

Ans: Iterates sequence; Syntax; Flow Fig 6.4. Progs 6-6/6-7/6-8 evens. range(): Parameters/examples (Ex 6.4). Prog 6-9 multiples. Known iterations.

Q24: Discuss while loop and examples.

Ans: Condition true repeat; Syntax; Flow Fig 6.5. Progs 6-10 naturals, 6-11 factors. Update to exit; Infinite risk. end=' ' for same line.

Q25: Elaborate break/continue with programs.

Ans: Break: Exit (Prog 6-12, 6-13 sum, 6-14 prime). Continue: Skip (Prog 6-15). Flow Figs 6.6/6.7. Flexibility; No infinite.

Q26: Explain nested loops with applications.

Ans: Loop in loop; Prog 6-16 demo. Patterns (6-17), primes (6-18 while inner), factorial (6-19). Unlimited levels; Mix types.

Q27: How control structures build programs?

Ans: Sequence base; Selection branches; Repetition iterates. Combined: Calculator/nested. Indentation enforces. 2025: Essential for algorithms/AI.

Q28: Difference between selection/repetition.

Ans: Selection: Choose path (if). Repetition: Repeat block (loops). Both alter sequence. Examples: Voting (select), naturals (repeat).

Q29: Role of indentation in Python.

Ans: Defines scope/blocks; No braces. Same indent level groups. Errors if wrong. Prog 6-4; Van Rossum: Guarantees proper indent.

Q30: Apply chapter to exercises like patterns/primes.

Ans: Nested loops for patterns (Ex 9); Break in primes. If-elif for grades (Ex 10). Case study: SMIS menu with selection/repetition.

Tip: Include programs/flowcharts in answers; Practice patterns/primes.

Concept	Precise Description	Example	Process/2025 Note
Selection	if/else/elif decisions	Positive diff (Prog 6-2)	Branch flow
Indentation	Block definition	1 tab/level (Prog 6-4)	Strict syntax
For Loop	Over range/sequence	Print 'PYTHON' (6-6)	Known iterations
While Loop	Condition repeat	Factors (6-11)	Avoid infinite
Break	Exit loop	At 8 (6-12)	Early terminate
Continue	Skip iteration	Skip 3 (6-15)	Next cycle
Nested Loops	Loop in loop	Pattern (6-17)	Patterns/primes
Range	Integer sequence	range(0,10) [0-9]	For generation

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Geomorphic Processes

Geography 10 Qs · ~10 min

#90

Distribution of Oceans and Continents

Geography 10 Qs · ~10 min

#91

Interior of the Earth

Geography 10 Qs · ~10 min

#92

The Origin and Evolution of the Earth

Geography 10 Qs · ~10 min

#93

Geography as a Discipline

Geography 10 Qs · ~10 min

#94

Paths to Modernisation

History 10 Qs · ~10 min

#95

Displacing Indigenous Peoples

History 10 Qs · ~10 min

#96

The Three Orders

History 10 Qs · ~10 min

#97

Comparative Development Experiences of India and its Neighbours

Economics 10 Qs · ~10 min

#98

Environment and Sustainable Development

Economics 10 Qs · ~10 min

#99

Employment: Growth, Informalisation and Other Issues

Economics 10 Qs · ~10 min

#100

Rural Development

Economics 10 Qs · ~10 min

#101

Human Capital Formation in India

Economics 10 Qs · ~10 min

#102

Liberalisation, Privatisation and Globalisation: An Appraisal

Economics 10 Qs · ~10 min

#103

Indian Economy on the Eve of Independence

Economics 10 Qs · ~10 min

#104

Use of Statistical Tools

Economics 10 Qs · ~10 min

#105

Index Numbers

Economics 10 Qs · ~10 min

#106

Correlation

Economics 10 Qs · ~10 min

#107

Measures of Central Tendency

Economics 10 Qs · ~10 min

#108

Presentation of Data

Economics 10 Qs · ~10 min

#109

Organisation of Data

Economics 10 Qs · ~10 min

#110

Collection of Data

Economics 10 Qs · ~10 min

#111

International Business

Business Studies 10 Qs · ~10 min

#112

Internal Trade

Business Studies 10 Qs · ~10 min

#113

MSME and Business Entrepreneurship

Business Studies 10 Qs · ~10 min

#114

Sources of Business Finance

Business Studies 10 Qs · ~10 min

#115

Formation of a Company

Business Studies 10 Qs · ~10 min

#116

Social Responsibilities of Business and Business Ethics

Business Studies 10 Qs · ~10 min

#117

Emerging Modes of Business

Business Studies 10 Qs · ~10 min

#118

Business Services

Business Studies 10 Qs · ~10 min

#119

Forms of Business Organisation

Business Studies 10 Qs · ~10 min

#120

Business, Trade and Commerce

Business Studies 10 Qs · ~10 min

#121

Financial Statements - II

Accountancy 10 Qs · ~10 min

#122

Financial Statements - I

Accountancy 10 Qs · ~10 min

#123

Depreciation, Provisions and Reserves

Accountancy 10 Qs · ~10 min

#124

Trial Balance and Rectification of Errors

Accountancy 10 Qs · ~10 min

#125

Bank Reconciliation Statement

Accountancy 10 Qs · ~10 min

#126

Recording of Transactions - II

Accountancy 10 Qs · ~10 min

#127

Recording of Transactions - I

Accountancy 10 Qs · ~10 min

#128

Theory Base of Accounting

Accountancy 10 Qs · ~10 min

#129

Probability

Maths 10 Qs · ~10 min

#130

Statistics

Maths 10 Qs · ~10 min

#131

Limits and Derivatives

Maths 10 Qs · ~10 min

#132

Introduction to Three Dimensional Geometry

Maths 10 Qs · ~10 min

#133

Conic Sections

Maths 10 Qs · ~10 min

#134

Straight Lines

Maths 10 Qs · ~10 min

#135

Sequences and Series

Maths 10 Qs · ~10 min

#136

Binomial Theorem

Maths 10 Qs · ~10 min

#137

Permutations and Combinations

Maths 10 Qs · ~10 min

#138

Linear Inequalities

Maths 10 Qs · ~10 min

#139

Complex Numbers and Quadratic Equations

Maths 10 Qs · ~10 min

#140

Relations and Functions

Maths 10 Qs · ~10 min

#141

Sets

Maths 10 Qs · ~10 min

#142

Chemical Coordination and Integration

Biology 10 Qs · ~10 min

#143

Neural Control and Coordination

Biology 10 Qs · ~10 min

#144

Locomotion and Movement

Biology 10 Qs · ~10 min

#145

Excretory Products and their Elimination

Biology 10 Qs · ~10 min

#146

Body Fluids and Circulation

Biology 10 Qs · ~10 min

#147

Breathing and Exchange of Gases

Biology 10 Qs · ~10 min

#148

Plant Growth and Development

Biology 10 Qs · ~10 min

#149

Respiration in Plants

Biology 10 Qs · ~10 min

#150

Photosynthesis in Higher Plants

Biology 10 Qs · ~10 min

#151

Cell Cycle and Cell Division

Biology 10 Qs · ~10 min

#152

Biomolecules

Biology 10 Qs · ~10 min

#153

Structural Organisation in Animals

Biology 10 Qs · ~10 min

#154

Morphology of Flowering Plants

Biology 10 Qs · ~10 min

#155

Hydrocarbons

Chemistry 10 Qs · ~10 min

#156

Equilibrium

Chemistry 10 Qs · ~10 min

#157

Chemical Bonding and Molecular Structure

Chemistry 10 Qs · ~10 min

#158

Classification of Elements and Periodicity in Properties

Chemistry 10 Qs · ~10 min

#159

Some Basic Concepts of Chemistry

Chemistry 10 Qs · ~10 min

#160

Waves

Physics 10 Qs · ~10 min

#161

Oscillations

Physics 10 Qs · ~10 min

#162

Kinetic Theory

Physics 10 Qs · ~10 min

#163

Thermodynamics

Chemistry 10 Qs · ~10 min

#164

Thermal Properties of Matter

Physics 10 Qs · ~10 min

#165

Mechanical Properties of Fluids

Physics 10 Qs · ~10 min

#166

Mechanical Properties of Solids

Physics 10 Qs · ~10 min

#167

Gravitation

Physics 10 Qs · ~10 min

#168

Systems of Particles and Rotational Motion

Physics 10 Qs · ~10 min

#169

Work, Energy and Power

Physics 10 Qs · ~10 min

#170

Trigonometric Functions

Maths 10 Qs · ~10 min

#171

Structure of Atom

Chemistry 10 Qs · ~10 min

#172

Laws of Motion

Physics 10 Qs · ~10 min

#173

Business Studies (Class 11) Practice Quiz | CBSE Class 11 Annual Assessment

10 Qs · ~10 min

#174

Economics (Class 11) Practice Quiz | CBSE Class 11 Annual Assessment

10 Qs · ~10 min

#175

Humanities Subjects Practice Quiz | CBSE Class 11 Annual Assessment

10 Qs · ~10 min

#176

Motion in a Straight Line Practice Quiz | CBSE Class 11 Annual Assessment

10 Qs · ~10 min

#177

Thermodynamic Processes and Laws Advanced Challenge | CBSE Class 11 Annual Assessment

10 Qs · ~10 min

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Flow of Control – NCERT Class 11 Computer Science Chapter 6 – Conditional and Looping Constructs in Python

Flow of Control

Enhanced Full Chapter Summary & Precise Notes from NCERT PDF (22 Pages)

Overview & Key Concepts

6.1 Introduction to Flow of Control

Precise Fig 6.1: Bus to School (SVG)

Program 6-1: Difference of Two Numbers

6.2 Selection

Precise Fig 6.2: Decision Flowchart (SVG)

Program 6-2: Positive Difference

Program 6-3: Simple Calculator

Example 6.1: if Syntax

Example 6.2: if-elif-else (Positive/Negative/Zero)

Example 6.3: Traffic Signal

6.3 Indentation

Program 6-4: Larger of Two Numbers

6.4 Repetition

Precise Fig 6.3: Iterative Process (SVG)

Program 6-5: First Five Natural Numbers

Program 6-6: Print 'PYTHON' Characters

Program 6-7: Print Sequence [10,20,30,40,50]

Program 6-8: Even Numbers

Example 6.4: range() Function

Program 6-9: Multiples of 10

Precise Fig 6.4: For Loop Flowchart (SVG)

Program 6-10: First 5 Natural (While)

Program 6-11: Factors of Number

Precise Fig 6.5: While Loop Flowchart (SVG)

6.5 Break and Continue

Precise Fig 6.6: Break Flowchart (SVG)

Program 6-12: Break Demo

Program 6-13: Sum Positives

Program 6-14: Prime Check

Precise Fig 6.7: Continue Flowchart (SVG)

Program 6-15: Continue Demo

6.6 Nested Loops

Program 6-16: Nested For

Program 6-17: Pattern

Program 6-18: Primes 2-50

Program 6-19: Factorial

Enhanced Features (2025)

Exam Tips

Selection Structures - if/else/elif Expanded

if Statement (Detailed)

if-else (Detailed)

if-elif-else (Detailed)

Selection Flow (SVG)

Indentation & Repetition - For/While Loops Expanded

Indentation (Detailed)

For Loop (Detailed)

While Loop (Detailed)

Loop Comparison (SVG)

Break/Continue & Nested Loops - Expanded Details & Examples

Break (Detailed)

Continue (Detailed)

Nested Loops (Detailed)

Nested Loop Flow (SVG)

30 Questions & Answers - NCERT Precise (Updated with Full Chapter)

1-Mark Questions (10 Questions, One-Line Answers)

Q1: What is flow of control?

Q2: Types of control structures?

Q3: Syntax for if?

Q4: Purpose of elif?

Q5: Indentation uses?

Q6: For loop iterates over?

Q7: While loop condition checked?

Q8: Break does what?

Q9: Continue skips?

Q10: Nested loop is?

4-Mark Questions (10 Questions, Five-Line Answers)

Q11: Explain selection with syntax.

Q12: Differentiate for and while.

Q13: Describe indentation rules.

Q14: Explain range() function.

Q15: Purpose of break/continue.

Q16: Nested loops application.

Q17: Infinite loop issue.

Q18: Positive difference program.

Q19: Prime number check.

Q20: Pattern printing.