Fork call working

Fork call working

can anybody explain me working of fork in detail
#include<unistd.h>
#include<stdio.h>
int main ()
{
int i, b;
for (i = 0; i < 2; i++) {
fflush (stdout);
b = fork ();
if (b == -1) {
perror ("error forking");
}
else if (b > 0) //parent process
{
wait ();
printf ("\nparent %d", getpid ());
}
else
printf ("\nchild %d %d", getpid (), getppid ());
}
return 0;
}
its just i need to know that if fork have same code as parent then this
for loop should never stop creating child processes (every child will have
its own for loop)