/**
 * This program gives a basic overview of 
 *  math operations in java
 *
 * @pblake
 * @2-25-21
 */

import java.util.Scanner;

public class BasicMath
{
    public static void main(String [] args)
    {
        //this is an inline comment
        //This is an example of an int variable
        int x = 20; 
        //This creates an integer variable called x  with a value of 5
        int y = 7;
        //ints represent posiitve or negative whole numbers
        
        //Basic operations
        System.out.println("x has value " + x);
        System.out.println("y has value " + y);
        //Adding two numbers
        System.out.println("x + y = " + (x + y));
        //Subtracting
        System.out.println("x - y = " + (x - y));
        //Multiplying
        System.out.println("x * y = " + (x * y));
        //Dividing is a little weird
        System.out.println("x / y (as integers) = " + ( x / y));
        
        /*
         * Multi line comment
         * When performing operations with integers, the result is
         * also an integer. 
         * That said 20 / 7 = 2.857, but only returns 2 
         * 2 is the integer part of that answer.
         */
        
        //Order of operations
        int z = 4;
        //x is 20, y is 7
        //Order of operations PEMDAS
        System.out.println(x - (y * z) + x / z);
        //                 20 - (28) + 20 / 4
        //                 20 - 28 + 5
        //                 -8 + 5 (adding and substracting are on the same level)
        //                 -3       (simply work left to right)
        
        //Prompting for a int
        Scanner in = new Scanner(System.in);
        System.out.println("Please enter an integer : " );
        int input = in.nextInt();
        
        int output = input * 3 + 5; 
        
        System.out.println("3 times your number plus 5 is " + output);
    }
}