How to pause for 1 second in C

C sleep usage

// pause for 1 second in c
#include <stdio.h>
#include <dos.h> // Windows uses this header file
#include <unistd.h> //linux uses this header file

int main(){
    printf("Hello,");
    sleep(1); // wait for 1 second
    printf("World");
    return 0;
}