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 needed to declare an immutable variable of type `Int` and initially assign it a value of **100**. You then needed to print `myFirstVariable`.

## Solution 

Let's look at each component separately:

* **Immutable Variable** - When declaring a variable, we first need to specify if it is immutable or mutable. An immutable variable is declared using the `val` keyword.

* **Variable Name** - After specifying the type of variable, we need to give the variable a name. In our case, the name of the variable is `myFirstVariable`.

* **Data Type** - After giving the variable an identifier, we need to specify its data type which is done using `:`. In our case, we needed a variable of type `Int` hence, we would need to write `:Int`.

* **Assigning a Value** - For assigning an initial value to the variable, we insert a `=` after the data type, followed by the desired value to be assigned. In our case, that value was **100**.

```
val myFirstVariable: Int = 100
```

* Finally, use either the `print` or `println` method to print `myFirstVariable`.

```
print(myFirstVariable)
```
or
```
println(myFirstVariable)
```
You can find the complete solution below:

# Task

In this challenge, you needed to declare an immutable variable of type `Int` and initially assign it a value of **100**. You then needed to print `myFirstVariable`.

# Solution 

Let's look at each component separately:

* **Immutable Variable** - When declaring a variable, we first need to specify if it is immutable or mutable. An immutable variable is declared using the `val` keyword.

* **Variable Name** - After specifying the type of variable, we need to give the variable a name. In our case, the name of the variable is `myFirstVariable`.

* **Data Type** - After giving the variable an identifier, we need to specify its data type which is done using `:`. In our case, we needed a variable of type `Int` hence, we would need to write `:Int`.

* **Assigning a Value** - For assigning an initial value to the variable, we insert a `=` after the data type, followed by the desired value to be assigned. In our case, that value was **100**.

```
val myFirstVariable: Int = 100
```

* Finally, use either the `print` or `println` method to print `myFirstVariable`.

```
print(myFirstVariable)
```
or
```
println(myFirstVariable)
```
You can find the complete solution below:

In the following lesson, we will go over the solution of the challenge: Declaring a Variable.

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: Declaring a Variable

Task

Solution