# Overiew
**`if`** expressions in Scala are a control structure. The syntax of the `if` expression is as follows:
```scala
if (expression) {
  doSomething()
}
```
In the syntax above, **`expression`** represents any Scala expression that returns a boolean value (either `true` or `false`). The code inside the curly braces gets executed only if the `expression` returns `true`.

Scala also supports `else if` and `else` constructs like other programming languages:
```scala
if (expression1) {
  doSomething1()
} else if (expression2) {
  doSomething2()
} else {
  doSomething3()
}
```

# In-line `if` expression
In Scala, the `if` expression always returns a value. This allows the `if` construct to be used as an expression itself. Consider the following example:

object Main extends App {
    var x = if (0 == 0) "Zero" else "One"
    println(x)
}

In the example above, the value of `x` is returned by the `if` expression. The `if` expression compares `0 == 0` and returns the string `Zero` (since `0 == 0` is `true`). This string gets stored in the variable `x` and is printed on the standard output.

What are if expressions in Scala?

Scala's if expressions act as control structures, returning values and supporting else if and else constructs.

What are if expressions in Scala?

Overiew

In-line if expression

In-line `if` expression