Java Program to Swap Two Numbers Using a Temporary Variable | Swap Values in Java | Java Tutorial

Publicado em: 31 Agosto 2025
no canal de: CSM Skills

Java Program to Swap Two Numbers Using a Temporary Variable 🚀
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In this tutorial, you will learn step by step how to swap two numbers in Java using a temporary variable. This is one of the most important basic Java programs frequently asked in interviews, coding tests, and university exams.

🔹 What You Will Learn in This Video / Blog:

Introduction to swapping numbers in Java

Why we use a temporary variable for swapping

Step-by-step explanation of the code

Dry run of the program (how values change during execution)

Printing the output of swapped numbers

Importance of this program in coding interviews and exams

Alternate ways to swap numbers in Java (without using temp variable, using arithmetic operators, using XOR operator)

📌 Concept Recap:
Swapping means exchanging values of two variables. For example, if a = 10 and b = 20, after swapping, a becomes 20 and b becomes 10.
In this program, we use a temporary variable to hold one value while assigning the other, preventing data loss.

💻 Java Code Example:

public class Swap {
public static void main(String[] args) {
int a = 30;
int b = 20;
int temp;

// swapping logic
temp = a;
a = b;
b = temp;

System.out.println("After Swapping:");
System.out.println("a = " + a);
System.out.println("b = " + b);
}
}

✅ Output:

After Swapping:
a = 20
b = 30

📖 Why This Program is Important?
This program is a beginner-friendly Java problem that helps you understand:

Variable assignment

Memory usage in Java

Step-by-step debugging of code

Logic building in programming

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🎯 Who Should Watch/Read?

Beginners in Java programming

Students preparing for exams

Job seekers preparing for Java coding interviews

Anyone learning Core Java basics

📢 Don’t forget to Like 👍, Share ↗, and Subscribe 🔔 for more Java tutorials, coding examples, and interview preparation content!

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