Swap two numbers without third variable

Easy 20 pts 100% acceptance csharp

Topics

Toolliyo edge

Swap values of two integers a = 5 and b = 10 using arithmetic and print the result.

Examples

Sample

Output

a=10, b=5

Static hints

a = a + b; then b = a - b; then a = a - b;

Toolliyo Coach

Stuck? Get a nudge — not the answer

Progressive help: Nudge → Guide → Approach. Full solution stays behind the Solution tab.

Your solution

Editor is open — no login wall to practice.

Ready — edit the code above and click Run or Submit.

Official solution

using System;

class Program
{
    static void Main()
    {
        int a = 5, b = 10;
        a = a + b;
        b = a - b;
        a = a - b;
        Console.WriteLine($"a={a}, b={b}");
    }
}

Prefer Coach (Nudge → Guide → Approach) before revealing. No forced signup.

Explanation

Add/subtract trick: after a=a+b, subtracting b from new a yields original a.

Prev Next All problems