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Loops

There may be a situation when you need to execute a block of code several number of times. In general statements are executed sequentially: The first statement in a function is executed first, followed by the second, and so on.

Programming languages provide various control structures that allow for more complicated execution paths.

A loop statement allows us to execute a statement or group of statements multiple times and following is the general from of a loop statement in most of the programming languages:

Types Of Loop

C programming language provides following types of loop to handle looping requirements. Click the following links to check their detail.

Loop Type Description
while loop Repeats a statement or group of statements while a given condition is true. It tests the condition before executing the loop body.
for loop Execute a sequence of statements multiple times and abbreviates the code that manages the loop variable.
do...while loop Like a while statement, except that it tests the condition at the end of the loop body
nested loops You can use one or more loop inside any another while, for or do..while loop.

Loop Control Statements

Loop control statements change execution from its normal sequence. When execution leaves a scope, all automatic objects that were created in that scope are destroyed.

C supports the following control statements. Click the following links to check their detail.

Control Statement Description
break statement Terminates the loop or switch statement and transfers execution to the statement immediately following the loop or switch.
continue statement Causes the loop to skip the remainder of its body and immediately retest its condition prior to reiterating.
goto statement Transfers control to the labeled statement. Though it is not advised to use goto statement in your program.




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