C Exercises: Find the length of a string without using the library function

C For Loop: Exercise-58 with Solution

Write a C program to find the length of a string without using the library function.

Pictorial Presentation:

Sample Solution:

C Code:

#include <stdio.h>
#include <string.h>

 
void main()
{
    char str1[50];
    int i, l = 0;

       printf("\n\nFind the length of a string:\n ");
       printf("-------------------------------------\n");
 
    printf("Input a string : ");
    scanf("%s", str1);
 
    for (i = 0; str1[i] != '\0'; i++)
    {
        l++;
    }
    printf("The string contains %d  number of characters. \n",l);
    printf("So, the length of the string %s is : %d\n\n", str1, l);
}

Sample Output:

Find the length of a string:                                                                                  
 -------------------------------------                                                                        
Input a string : welcome                                                                                      
The string contains 7  number of characters.                                                                  
So, the length of the string welcome is : 7 

Flowchart:

C Programming Code Editor:

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