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

Last update on December 20 2024 12:29:33 (UTC/GMT +8 hours)

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

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Sample Solution:-

C++ Code :

#include <iostream> // Include the input/output stream library
#include <string>   // Include the string handling library
using namespace std; // Using standard namespace

int main() // Main function where the execution of the program starts
{
    char str1[50]; // Declare a character array to store the string
    int i, l = 0; // Declare integer variables i (for iteration) and l (for counting length)

    // Display message asking for input
    cout << "\n\n Find the length of a string:\n";
    cout << "---------------------------------\n";
    cout << " Input a string: ";
    cin >> str1; // Read input string from user

    // Loop to count the number of characters in the string
    for (i = 0; str1[i] != '\0'; i++) {
        l++; // Increment the length counter for each character encountered
    }

    // Display the number of characters counted in the string
    cout << "The string contains " << l << " number of characters." << endl;
    cout << "So, the length of the string " << str1 << " is:" << l << endl;
}

Sample Output:

 Find the length of a string:                                          
---------------------------------                                      
 Input a string: w3resource.com                                        
The string contains 14 number of characters.                           
So, the length of the string w3resource.com is:14 

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