Go Program – Swap Two Numbers

Go – Swap Two Numbers

In this tutorial, we will learn how to swap two numbers using the Go programming language (Golang). Swapping two numbers means exchanging their values. This task demonstrates the use of variables and assignment operators in programming. We will provide a simple program to implement this functionality and explain it step by step.

---

Logic to Swap Two Numbers

The logic for swapping two numbers involves using a temporary variable to hold the value of one number while exchanging their values:

1. Store the First Number: Save the value of the first number in a temporary variable.
2. Assign the Second Number: Assign the value of the second number to the first number.
3. Restore the First Number: Assign the value of the temporary variable (which holds the original first number) to the second number.

This logic ensures that the values of the two numbers are swapped without being lost.

---

Example Program to Swap Two Numbers

Program – swap_two_numbers.go

package main

import "fmt"

func main() {
    // Declare variables to hold two numbers
    var num1, num2 int

    // Prompt the user to enter two numbers
    fmt.Print("Enter two integers separated by space: ")
    fmt.Scan(&num1, &num2)

    // Display the original values
    fmt.Println("Before swapping:")
    fmt.Println("num1 =", num1, ", num2 =", num2)

    // Swap the numbers using a temporary variable
    temp := num1
    num1 = num2
    num2 = temp

    // Display the swapped values
    fmt.Println("After swapping:")
    fmt.Println("num1 =", num1, ", num2 =", num2)
}

Explanation of Program

1. Declare Variables: Two integer variables, num1 and num2, are declared to store the user input.
2. Prompt the User: The program prompts the user to enter two integers separated by space using the fmt.Print function.
3. Read the Inputs: The fmt.Scan function reads the inputs and stores them in num1 and num2.
4. Display Original Values: The original values of the numbers are displayed using fmt.Println.
5. Swap the Numbers: A temporary variable temp is used to hold the value of num1. Then num2 is assigned to num1, and temp (which holds the original value of num1) is assigned to num2.
6. Display Swapped Values: The swapped values of the numbers are displayed using fmt.Println.

Output

This program successfully swaps the values of two numbers using a temporary variable and displays the result.