c program string funtion

C Program to Find the Length of a String without using the Built-in Function

This is a C program to find the length of a string without using the built-in function.

Problem Description

This program takes a string as input and finds its length without using the built-in function.

Problem Solution

1. Take a string as input and store it in the array.
2. Using for loop count the number of characters in the array and store the result in a variable.
3. Print the variable as output.

Program/Source Code

Here is source code of the C program to find the length of a string without using the built-in function.The C program is successfully compiled and run on a Linux system. The program output is also shown below.

Required knowledge

• for loop  , string   , function and recursion in c program     just click 

program : 

#include<stdio.h>

int main()

{

    char str1[100]="atikur rahman";

       int i,j,len;

    ///len=0;

        for(len=0;str1[len]!='\0';len++);

    printf("length : %d",len);

}

 output :