Java introduction int type

public class MainClassPrimitiveInteger {
    public static void main(String[] args) {
        int myNumber = 5; // Integer (whole number)
        /**
         * Use int to represent whole positive and negative numbers.
         * You can use this type of variables to perform mathematical operations
         */

        // ------------- Add two positive numbers -------------
        int myFirstNumber = 100;
        int mySecondNumber = 200;

        int resultAddTwoPosNumbers = myFirstNumber + mySecondNumber;
        System.out.println("myFirstNumber + mySecondNumber = " + resultAddTwoPosNumbers);

        // ------------- Reuse same variable ------------------
        int justPositiveNumber = 20;
        // it will add 20 + 20 = 40 and overwrite justPositiveNumber
        justPositiveNumber = justPositiveNumber + justPositiveNumber;
        System.out.println("justPositiveNumber + justPositiveNumber = " + justPositiveNumber);

        // ------------- Reuse same variable another example -------------
        int anotherPositiveNumber = 10;
        anotherPositiveNumber += anotherPositiveNumber;
        // it will add 10 + 10 = 20 and overwrite anotherPositiveNumber
        System.out.println("anotherPositiveNumber + anotherPositiveNumber = " + anotherPositiveNumber);

        // ------------- Add Positive number and negative number -------------
        int myPositiveNumber = 10;
        int myNegativeNumber = -5;

        int resultAddPosNegNumber = myPositiveNumber + myNegativeNumber;
        // 10 + (- 5) = 10 - 5 = 5
        System.out.println("myPositiveNumber + myNegativeNumber = " + resultAddPosNegNumber);

        // ------------- Subtract two positive numbers -------------
        int testNumber = 10;
        int testNumberSecond = 5;

        int subtract = testNumber - testNumberSecond;
        // 10 - 5 = 10 - 5 = 5
        System.out.println("testNumber + testNumberSecond = " + subtract);

        //  ------------- Use int numbers with comparison operators -------------
        int bigNumber = 2_000;
        int smallNumber = 20;
        boolean firstComparison = bigNumber > smallNumber;
        System.out.println("Is bigNumber > smallNumber " + firstComparison);

        boolean secondComparison = bigNumber < smallNumber;
        System.out.println("Is bigNumber < smallNumber " + secondComparison);

        boolean tirthComparison = bigNumber == smallNumber;
        System.out.println("Is bigNumber > smallNumber " + tirthComparison);

    }
}