Learn Scala programming language, covering basics like variables, operators, and strings, and advanced topics like classes, functions, tail recursion, and Scala objects.

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This course teaches you programming in Scala, one of the most popular languages today, used by companies like Twitter and LinkedIn. Scala is a statically typed, high-level language that blends functional and object-oriented programming, making it ideal for building scalable applications.

 This course covers everything from basic concepts like Scala variables, type casting in Scala, and print in Scala to advanced topics like recursive functions in Scala, tail recursion, Scala classes, and more. Whether building scalable apps or improving your skills, this course will help you master Scala programming.

Learn Scala

A function is treated like a basic data value such as an integer.

What does it mean for a function to be treated as a first-class value?

What does it mean for a function to be treated as a first-class value?

```
def func1(f: Int => Int, x: Int) = {
  print(f(x))
}
```

```
def func2(f: Int => Int, x: Int) = {
  print(f)
}
```

```
def func3(x: Int, f: Int => Int) = {
  print(f(x))
}
```

```
def func4(f: (Int,Int) => Int, x: Int, y: Int) = {
  print(f(x,y))
}
```

The code snippets below are using functions as function parameters. Which of the following will result in a syntax error?

The code snippets below are using functions as function parameters. Which of the following will result in a syntax error?

The code snippets below are anonymous functions which return the product of two numbers. Which of the following are the incorrect implementation?

The code snippets below are anonymous functions which return the product of two numbers. Which of the following are the incorrect implementation?

Syntax that makes code easier to read and express

Syntax which changes the functionality of the code

It's just a cool way of saying *'sweet syntax!'*

What is syntactic sugar?

Anonymous functions are syntatic sugar because they don't bring any change to the expressive power of Scala.

Anonymous functions are syntatic sugar because they don’t bring any change to the expressive power of Scala.

The function `saySomething`, returns an anonymous function. What will be the output of the following code?

```
def saySomething(prefix: String) = (s: String) => {
  prefix + " " + s
}

def saySomethingElse = saySomething("hello")

print(saySomethingElse("there"))
```

The function <code>saySomething</code>, returns an anonymous function. What will be the output of the following code?
<pre><code>def saySomething(prefix: String) = (s: String) =&gt; {
 prefix + &quot; &quot; + s
}

def saySomethingElse = saySomething(&quot;hello&quot;)

print(saySomethingElse(&quot;there&quot;))
</code></pre>

A way of writing functions with multiple parameter lists

`add` is a curried function. What will be the output of the following code?

```
def add(a: Int)(b: Int) = a + b

val first = add(1)(5) 

val second = add(4)_ 

val third = second(2) 

print(first == third) 
```

<code>add</code> is a curried function. What will be the output of the following code?
<pre><code>def add(a: Int)(b: Int) = a + b

val first = add(1)(5) 

val second = add(4)_ 

val third = second(2) 

print(first == third) 
</code></pre>

In the next chapter, we will move on to **classes** and **objects**.

In the following quiz, you will be tested on concepts you learned in this chapter.

Introduction to Scala

Variable in Scala

Scala Operators

Scala Strings

Scala Library

Scala Control Structures

Functions in Scala

High Order Functions in Scala

Scala Classes

Conclusion

Chapter Quiz