Page 55 - Modular_V1.1_Flipbook
P. 55
06 LOOPS
Your Aim
to learn about:
The for Loop The while Loop
The do-while Loop Nested Loop
Infinite Loop
Difference Between while and do-while Loops
Jump Statements More Solved Programs
Sometimes, you may need to repeat a task several times or until a condition is satisfied. In C++, the
statements that are used to repeat a set of instructions are called iterative or looping statements.
It saves the trouble of writing the same statement again and again. Looping statements are very
useful and necessary for developing applications.
Loops allow you to repeat a section of your program for a certain number of times. The repetition
continues until a condition is true. When the condition becomes false, the loop ends and control
passes to the statements following the loop. C++ provides three kinds of loops which are for
loop, while loop and do-while loop.
THE FOR LOOP
The for loop executes a simple or compound statements for a fixed number of times or until a
condition becomes false. The syntax of the for statement is given below:
for(initialization; condition; counter)
{
statements;
}
where,
initialization is a method to assign value to the variable(s) starting the loop (called loop
variables). Once the initialization process is completed, it’s never evaluated again.
condition is a conditional expression to decide whether to enter the loop or not.
counter is a variable to change the value(s) of loop variable(s) after each iteration. Iteration
is the process of running a loop one time.
Loops 53

