NCERT Book Class 11 Computer Science Flow of Control

Computer Science
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6.1 Introduction
In Figure 6.1, we see a bus carrying the children to school. There is only one way to reach the school. The driver has no choice, but to follow the road one milestone after another to reach the school. We learnt in Chapter 5 that this is the concept of sequence, where Python executes one statement after another from beginning to the end of the program. These are the kind of programs we have been writing till now.
 
NCERT Class 11 Computer Science Flow of Control
 
Let us consider a program 6-1 that executes in sequence, that is, statements are executed in an order in which they are written.
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.
 
Program 6-1 Program to print the 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


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Official NCERT Textbook PDF: Class 11 Computer Science Chapter 6 Flow of Control

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Yes, our collection of Class 11 Computer Science NCERT books follow the 2026 rationalization guidelines. All deleted chapters have been removed and has latest content for you to study.

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NCERT books are the main source for NCERT exams. By reading NCERT Book Class 11 Computer Science Flow of Control line-by-line and practicing its questions, students build strong understanding to get full marks in Computer Science.