String length c code

C program to find string length

#include <stdio.h>
#include <string.h>
 
int main()
{
   char a[100];
   int length;
 
   printf("Enter a string to calculate it's length\n");
   gets(a);
 
   length = strlen(a);
 
   printf("Length of entered string is = %d\n",length);
 
   return 0;
}

Download String length program.

Output of program:

You can also find string length using pointer or without strlen function. Following program shows how to achieve this.

C program to find string length without strlen

C program to find length of a string using pointers.

#include <stdio.h>
 
int 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;
}

Function to find string length

int string_length(char *s)
{
   int c = 0;
 
   while(*(s+c))
      c++;
 
   return c;
}