Write a program to convert Uppercase to LowerCase

Write a program to convert Uppercase to LowerCase

Examples:

Input: str= “GEEKSFORGEEKS”
Output: “geeksforgeeks”

Input: str= “CAT”
Output: “cat”

Approach:

Iterate through each character in a string and add 32 in the ASCII value of each character.

• ASCII value of lowercase char ‘a’ to ‘z’ ranges from 97 to 122
• ASCII value of uppercase char ‘A’ to ‘Z’ ranges from 65 to 92
• For conversion add 32 in the ASCII value of input char

Below is the implementation of the above approach:

C++

#include <iostream>
using namespace std;

int main() {

    string str="GEEKSFORGEEKS";
    string ans="";

    for(int i=0;i<str.size();i++){
    ans+=str[i] +32 ;
    }

    cout<<ans;
}

Java

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        // Input string
        String str = "GEEKSFORGEEKS";

        // Resultant string
        String ans = "";

        // Iterate through each character in the input string
        for (int i = 0; i < str.length(); i++) {
            // Convert the character to lowercase and append to the result string
            ans += Character.toLowerCase(str.charAt(i));
        }

        // Print the result
        System.out.println(ans);
    }
}

Python3

# Given string
str_input = "GEEKSFORGEEKS"

# Empty string to store the result
ans = ""

# Iterate through each character in the input string
for char in str_input:
    # Convert each character to lowercase and append it to the result string
    ans += char.lower()

# Print the result string
print(ans)

C#

using System;

class Program
{
    static void Main()
    {
        // Input string
        string str = "GEEKSFORGEEKS";

        // Resultant string
        string ans = "";

        // Iterate through each character in the input string
        for (int i = 0; i < str.Length; i++)
        {
            // Convert the character to lowercase and append to the result string
            ans += char.ToLower(str[i]);
        }

        // Print the result
        Console.WriteLine(ans);
    }
}

Javascript

// JavaScript code for above approach
// The code converts all characters in the input string to lowercase.

// Input string
let str = "GEEKSFORGEEKS";

// Resultant string
let ans = "";

// Iterate through each character in the input string
for (let i = 0; i < str.length; i++) {
    // Convert the character to lowercase and append to the result string
    ans += str[i].toLowerCase();
}

// Print the result
console.log(ans);

Output

geeksforgeeks

Time Complexity: O(N)
Auxiliary space: O(1)