Strncmp Function

Synopsis:
#include <stdio.h>
int strncmp(char *string1, char *string2, int n); 
Description:
The strncmp function compares first n characters of string1 and string2 and returns a value indicating their relationship.
Return Value
if Return value if < 0 then it indicates string1 is less than string2
if Return value if > 0 then it indicates string2 is less than string1
if Return value if = 0 then it indicates string1 is equal to string1
Example
#include <stdio.h>
int main() 
{
  char string1[20];
  char string2[20];
  strcpy(string1, "Hello");
  strcpy(string2, "Hellooo");
  printf("Return Value is : %d\n", strncmp( string1, string2, 4));
  strcpy(string1, "Helloooo");
  strcpy(string2, "Hellooo");
  printf("Return Value is : %d\n", strncmp( string1, string2, 10));
  strcpy(string1, "Hellooo");
  strcpy(string2, "Hellooo");
  printf("Return Value is : %d\n", strncmp( string1, string2, 20));
  return 0;
}
It will proiduce following result:
Return Value is : 0
Return Value is : 111
Return Value is : 0