Find String Length without strlen

/*
Write a program in C to find string length without strlen
*/ 
 
#include<stdio.h>

main()
{
char array[100], *pointer;
int length = 0;

printf("Enter a string\n");
gets(array);

pointer = array;

while(*(pointer+length))
length++;

printf("Length of entered string = %d\n",length);

return 0;
}