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 were provided a string in which you had to find the first occurrence of a three-letter word. The only constraint was that the word must only contain lower-case letters. 

## Solution

The first thing you had to write was a regular expression which represented three-letter words only consisting of lower-case letters and store it in a variable. Something like this:

 ```
val expressionToFind = "[a-z]{3}".r
```

* `[a-z]` specifies that the regular expression should only contain lower-case letters
* `{3}` specifies that the regular expression should have a length of **3**.




You then had to call the `findFirstIn` method on the regular expression and pass it the string you wanted to search. Recall that `findFirstIn` only finds the first occurrence of the specified regular expression.

```
val match1 = expressionToFind.findFirstIn(stringToFindExpression)
```

You can find the complete solution below:

>You were required to write the code on  **line 2** and **line 3**.

# Task

In this challenge, you were provided a string in which you had to find the first occurrence of a three-letter word. The only constraint was that the word must only contain lower-case letters. 

# Solution

The first thing you had to write was a regular expression which represented three-letter words only consisting of lower-case letters and store it in a variable. Something like this:

 ```
val expressionToFind = "[a-z]{3}".r
```

* `[a-z]` specifies that the regular expression should only contain lower-case letters
* `{3}` specifies that the regular expression should have a length of **3**.




You then had to call the `findFirstIn` method on the regular expression and pass it the string you wanted to search. Recall that `findFirstIn` only finds the first occurrence of the specified regular expression.

```
val match1 = expressionToFind.findFirstIn(stringToFindExpression)
```

You can find the complete solution below:

>You were required to write the code on  **line 2** and **line 3**.

In the following lesson, we will go over the solution of the challenge: Searching a String.

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: Searching a String

Task

Solution