delay function in c

Delay in c: delay function is used to suspend execution of a program for a particular time.
Declaration :- void delay(unsigned int);
Here unsigned int is the number of milliseconds ( remember 1 second = 1000 milliseconds ). To use delay function in your program you should include the dos.h header file.

C programming code for delay

#include<stdio.h>
#include<stdlib.h>
 
main()
{
    printf("This c program will exit in 10 seconds.\n");        
 
    delay(10000);                         
 
    return 0;
}

Above c program exits in ten seconds, after the printf function is executed the program waits for 10000 milliseconds or 10 seconds and then program termination occurs.

Delay in c program

: If you don't wish to use delay function then you can use loops to produce delay in c program.

#include<stdio.h>
 
main()
{
   int c = 1, d = 1;
 
   for ( c = 1 ; c <= 32767 ; c++ )
       for ( d = 1 ; d <= 32767 ; d++ )
       {}
 
   return 0;
}

We don't write any statement in the loop body.