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6
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, we need to repeat a task multiple times or until a condition is met. In C++, statements
used to repeat instructions are called looping statements or iterative statements. Loops help
us avoid writing the same code again and again, making programs shorter and more efficient.
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 types of loops: 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(initialisation; condition; update)
{
statements;
}
Components of a for loop:
initialisation is a method to assign value to the variable(s) starting the loop (called loop
variables). Once the initialisation process is completed, it’s never evaluated again.
condition is a conditional expression to decide whether to enter the loop or not.
update 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.
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Loops

