Learn the syntax, data types, and operations essential for programming in Scala

Become a Scala Developer

In this module, we will learn Scala from the ground up. This module aims to teach us how to write basic programs, assuming we have no prior knowledge of the language. We will start with a brief introduction to Scala to understand its functionality and applications. We will then move discuss the key features and functions of the language (data types, functions, classes, etc.) in detail. In the end, we will have all the basic knowledge of how to program in Scala.

Learn Scala from Scratch

## Task

In this challenge, you had to create a function which computes the absolute value of a given number.


## Solution

A skeleton of the function was already provided for you. Let's look it over.

```
def absolute(x: Double): Double = {

}
```

The function name is `absolute`, and it takes a single parameter of type `Double` and returns a value of type `Double`.

The parameter name is `x` and is the number whose absolute value needs to be calculated. The absolute value of a number is simply the positive value of the number after ignoring its signs (`+` or `-`). Hence, if the given number is `x`, we first need to check if it is positive or negative. If it is negative, we will return its positive value by multiplying the number with `-`.

```
-(x) or -x
```

If the number is positive, we will simply return it as is.

```
x
```

You can find the complete solution below:

>You were required to write the code on **line 2**.

# Task

In this challenge, you had to create a function which computes the absolute value of a given number.


# Solution

A skeleton of the function was already provided for you. Let's look it over.

```
def absolute(x: Double): Double = {

}
```

The function name is `absolute`, and it takes a single parameter of type `Double` and returns a value of type `Double`.

The parameter name is `x` and is the number whose absolute value needs to be calculated. The absolute value of a number is simply the positive value of the number after ignoring its signs (`+` or `-`). Hence, if the given number is `x`, we first need to check if it is positive or negative. If it is negative, we will return its positive value by multiplying the number with `-`.

```
-(x) or -x
```

If the number is positive, we will simply return it as is.

```
x
```

You can find the complete solution below:

>You were required to write the code on **line 2**.

In the following lesson, we will go over the solution of the challenge:  Absolute Value.

Getting to Know Scala

Variables and Types

Operating with Operators

Strings and How to Use Them

Scala's Collection Library

Control Structures

Getting Started with Functions

Higher-Order Functions

Classes and Objects

Conclusion

Solution Review: Absolute Value

Task

Solution