how to us esleep command code example

Example 1: sleep command bash

sleep NUMBER[SUFFIX]	#Just use this command structure to wait/sleep
#Example:
sleep 5m	#sleeps 5 minutes
sleep 0.1		#sleeps 0.1 seconds or 100 miliseconds
#Suffixes
s - seconds (default)
m - minutes
h - hours
d - days
When no suffix is specified, it defaults to seconds.

Example 2: linux sleep with exec /bin/sleep

int pid= fork();
if (pid==0) { // child
	execl("/bin/sleep", "sleep", argv[1], NULL); // argv[1] is the sleeptime
    perror("execl");
    return EXIT_FAILURE;
}
if (waitpid(pid,NULL,0)<0) {
	perror("waitpid");
    return EXIT_FAILURE;
}