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Learn Java: Manipulating Variables

Introduction

Let’s say we are writing a program that represents a user’s bank account.

With variables, we know how to store a balance! We’d use a `double`

, the primitive type that can hold big decimal numbers.

But how would we deposit and withdraw from the account?

Java has built-in math operations that perform calculations on numeric values!

To deposit:

// declare initial balance double balance = 20000.99; // declare deposit amount double depositAmount = 1000.00; // store result of calculation in new variable double updatedBalance = balance + depositAmount;

Throughout this lesson, we will learn how to perform math on different datatypes and compare values.

### Instructions

**1.**

In the file **GuessingGame.java**, we have defined two integers `mystery1`

and `mystery2`

.

We will talk about these operators, among others, in the rest of the lesson.

Use `System.out.println()`

to print the variable that holds a value of `2`

.