Gain insights into Java programming by exploring conditional statements, loops, math, logic, inheritance, generics, and arraylists, to become an intermediate Java developer.

Learn Java for free with this interactive course, and get a handle on one of the most popular programming languages in the world.

You'll start with a simple hello world program and proceed to cover common concepts such as Conditional Statements, Loop Statements, Math, and Logic in Java, before moving on to more advanced concepts like Inheritance, Generics, and ArrayLists, along with much more.

By the time you're done, you'll be an intermediate level Java developer, ready to take on your own projects.

Learn Intermediate Java

class HelloWorld {
    public static void main( String args[] ) {
       double x = 55.0;
       double y = 18.0;
       double z = 51.0;
       double answer;
       double sum = Math.pow(x, 2) + Math.pow(y, 2);
       double sub = sum - Math.abs(z);
       answer = Math.cbrt(sub);
       System.out.println(answer);
    }
}

# Understanding the Code

**Line 7**
* The first step is to create a **double** type variable called `sum`.
* This variable stores the *addition result* of **two** expressions.
* The first of these expressions is the **square of x** calculated using the `pow()` method. 
* The second is the same but with variable **y**.
* The sum of the two expressions is assigned to the variable `sum`.

**Line 8**
* The first step is to create a **double** type variable called `sub`.
* This variable stores the *subtraction result* of **two** expressions.
* The variable from which the expression is to be subtracted is the `sum`. 
* The second is the **absolute** value of **z** calculated using the method `abs()`.
* This expression is **subtracted** from `sum`, and the answer is stored in `sub`.

**Line 9**
* The **cube root** of the variable `sub` is calculated in the final step. 
* This is done using the `cbrt()` method.
* The final result is stored in the `answer` variable.

In this review, the solution of the challenge 'Compute an expression using maths' from the previous lesson is provided.

Getting Started with Java!

Variables & User Input

Simple Maths & Logic

Strings and String Processing

Conditional Statements

Loops

Methods

Arrays

Classes and Inheritance

Generics

ArrayLists

Java Exam

Solution Review: Compute an Expression Using Maths

Solution

Understanding the Code