why is string equal to ?? c code example

Example: c string equal

int strEqu(char *a, char *b)
{
	int i = 0;
	while (1)
	{
		if (*(a + i) == 0 && *(b + i) == 0) return 1;
		else if (*(a + i) != *(b + i)) return 0;
		i++;

	}

}