subtract two variables in java

1public class Subtraction{
2  	//simple subtraction method in Java
3	public static void main(String args[]){
4    	int x = 3; // initializing first variable with a value
5      	int y = 1; // initializing second variable
6      	
7      	int answer = x - y; // new variable which is subtracting two variables x and y
8      	
9      	System.out.println( x + " - " + y + " = " + answer );
10      	// printing the answer of variables on the console
11    }
12}