public class Demo
{
    public static void main(String[] args) 
    {
        int x;
        
        x = 4;      
        System.out.println("Before increment(): x = " + x);
        
        increment(x); // PASS x to method "increment"
        System.out.println("After  increment(): x = " + x); 
    } 
    
    public static void increment(int a )  
    {
        a = a + 1;   // Update parameter variable 
    }  
}