String length

This program prints length of string, for example consider the string "c programming" it's length is 13. Null character is not counted when calculating string length. To find string length we use strlen function of string.h.

C program to find string length

#include <stdio.h>

#include <string.h>

void main()

{

   char a[100];

   int length;

   clrscr();

   printf("Enter a string to calculate it's length\n");

   gets(a);

   length = strlen(a);

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

   getch();

}

C program to find string length without strlen

#include <stdio.h>

#include<conio.h> 

void main()

{

   char array[100], *pointer;

   int length = 0;

   clrscr();

   printf("Enter a string\n");

   gets(array);

   pointer = array;

   while(*(pointer+length))

   length++;

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

   getch();

}

Function to find string length

int string_length(char *s)

{

   int c = 0;

   while(*(s+c))

   c++;

   return c;

}