Java Topics
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- Sum of Array
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- Swap Two Numbers
- Triangular Number
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- Java Alphabet Pattern
Java Program to Swap Two Numbers
Photo Credit to CodeToFun
π Introduction
In the world of programming, performing basic operations on numbers is a fundamental task. Swapping two numbers is one such operation that involves exchanging the values of two variables. This operation is commonly used in various algorithms and programs.
In this tutorial, we will explore a simple Java program designed to swap the values of two numbers.
π Example
Let's delve into the Java code that accomplishes this task.
import java.util.Scanner;
public class SwapNumbers {
// Function to swap two numbers
static void swapNumbers(int[] arr) {
// Ensure that the array has exactly two elements
if (arr.length == 2) {
// Swap the elements using a temporary variable
int temp = arr[0];
arr[0] = arr[1];
arr[1] = temp;
} else {
System.out.println("Array must have exactly two elements.");
}
}
// Driver program
public static void main(String[] args) {
// Replace these values with the numbers you want to swap
int[] numbers = {
5,
10
};
System.out.printf("Before swapping: num1 = %d, num2 = %d%n", numbers[0], numbers[1]);
// Call the function to swap the numbers
swapNumbers(numbers);
System.out.printf("After swapping: num1 = %d, num2 = %d%n", numbers[0], numbers[1]);
}
}
π» Testing the Program
To test the program with different numbers, modify the values of the numbers array in the main method.
Before swapping: num1 = 5, num2 = 10 After swapping: num1 = 10, num2 = 5
Compile and run the program to see the result of swapping the two numbers.
π§ How the Program Works
- The program defines a class SwapNumbers containing a static method swapNumbers that takes an array of integers as a parameter and swaps the values of the two elements in the array.
- Inside the main method, replace the values of the numbers array with the numbers you want to swap.
- The program prints the values of the two numbers before and after swapping.
π§ Understanding the Concept of Swapping Two Numbers
Swapping two numbers involves exchanging their values. In the provided program, a temporary variable is used to hold the value of one variable while the values of the two variables are exchanged.
π’ Optimizing the Program
While the provided program is a straightforward way to swap two numbers, consider exploring and implementing alternative approaches or optimizations.
Feel free to incorporate and modify this code as needed for your specific use case. Happy coding!.
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