Write a Golang program to swap two numbers without using a third variable

Approach to solve this problem

• Step 1: Define a function that accepts two numbers, type is int.
• Step 2: Find b = a + b;
• Step 3: Then a = b – a and b = b – a

Program

Live Demo

package main
import "fmt"

func swap(a, b int){
   fmt.Printf("Before swapping, numbers are %d and %d\n", a, b)
   b = a + b
   a = b - a
   b = b - a
   fmt.Printf("After swapping, numbers are %d and %d\n", a, b)
}

func main(){
   swap(23, 45)
   swap(56, 100)
}

Output

Before swapping, numbers are 23 and 45
After swapping, numbers are 45 and 23
Before swapping, numbers are 56 and 100
After swapping, numbers are 100 and 56