# 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 = 100

After line 2: x = y
x = 200

After 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); ` `    ``} ` `} `

Output:

```Before Swap
x = 100
y = 200
After swap
x = 200
y = 100
```
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