#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
int main() {
// make two process which run same
// program after this instruction
fork();
// this will print hello world twice
printf("Hello world!
");
return 0;
} Hello, World!
This is parent section [Process id: 1252].
fork created [Process id: 1253].
fork parent process id: 1252.
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