Chapter 4-Loops

There are 4 loops :

• The while loops
• The do-while loops
• The for loops
• The odd loops 

Definiton of loops:
->Loops is use to repeat a program so that we do not need to re-write the coding again and again.

•There are three methods by way of which we can repeat a part of a program. They are:

–(a) Using a while statement

–(b) Using a for statement

–(c) Using a do-while statement

The while loop:

initialize loop counter ;

while ( test condition )

{

  do this ;

  and this ;

  increment loop counter ;

}

The do-while loop:

do

{

this ; 

and this ;

and this ; 

and this ; 

} 

while ( this condition is true ) ;

Do-while loop will still run even the first time is an error. 

The for loops:

for ( initialize counter; test counter; increment counter

  )

{

  do this ;

  and this ;

}

The odd loops:

 example of odd loop

#include <stdio.h>
int main(void )
{
    char another ;
    int num ;
    do
    {
        printf ( "Enter a number " ) ;
        scanf ( "%d", &num ) ;
        printf ( "square of %d is %d", num, num * num ) ;
        printf ( "\nWant to enter another number y/n " ) ;
        scanf ( " %c", &another ) ;
    } while ( another == 'y' ) ;
} 

 

  the output is:

 

thats the end of chapter 4...