Toggle Case

Medium Strings
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Problem Statement

Write a C++ program that reads a string and toggles the case of every character (uppercase to lowercase and vice versa).

Input Format

A single word string S.

Output Format

Print the case-toggled string.

Constraints

1 <= Length <= 50

Sample Input

HelloWorld

Sample Output

hELLOwORLD

Explanation

Iterates through characters converting uppercase to lowercase and vice versa.

Starter Code

#include <iostream>
#include <string>
#include <cctype>

int main() {
    std::string s;
    if (std::cin >> s) {
        // Write your code here
    }
    return 0;
}

Limits

  • Time Limit: 1s
  • Memory Limit: 256MB

Embedded C Programming

Updated: March 15, 2026
Intermediate

Embedded systems rely on efficient low-level programming to interact directly with hardware. In this course, you will learn how to write practical Embedded C programs used in real microcontroller-based systems. Rather than focusing only on theory, this course follows a practice-driven approach. Each lesson includes hands-on coding exercises that simulate real firmware development tasks used