Java Program to Swap two Variables
Given two numbers x and y, we need to swap their values
Examples:
Input : x = 10, y = 20; Output : x = 20, y = 10 Input : x = 200, y = 100 Output : x = 100, y = 200
Below are the simple steps we follow:
1) Assign x to a temp variable : temp = x
2) Assign y to x : x = y
3) Asign temp to y : y = temp
Let us understand with an example.
x = 100, y = 200
After line 1: temp = x
temp = 100After line 2: x = y
x = 200After line 3 : y = temp
y = 100
// Java program to swap two variables public class GfG { public static void main(String[] args) { int x = 100, y = 200; System.out.println("Before Swap"); System.out.println("x = " + x); System.out.println("y = " + y); int temp = x; x = y; y = temp; System.out.println("After swap"); System.out.println("x = " + x); System.out.println("y = " + y); } } |
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Output:
Before Swap x = 100 y = 200 After swap x = 200 y = 100
