C program to find the length of a string?

The string is actually a one-dimensional array of characters which is terminated by a null character '\0'. Thus a null-terminated string contains the characters that comprise the string followed by a null.

To find the length of a string we need to loop and count all words in the loop until the ‘\0’ character is matched.

For example

Input −naman 

Output − string length is 5

Explanation − we need to iterate over each index of the string until reach the end of string means ‘\0’ which is the null character. 

Example

#include <stdio.h>
#include<string.h>
int main() {
   char string1[]={"naman"};
   int i=0, length;
   while(string1[i] !='\0') {
      i++;
   }
   length=i;
   printf(" string length is %d",length);
   return 0;
}

Output

string length is 5