# Ternary Conditional Operator

There is only one ternary conditional operator, the ternary conditional operator (`a ? b : c`).

It behaves like an if-statement, but is an expression: If the first operator value is true, the second operator value is returned. If the first operator value is false, the third value is returned.

The first value must be a boolean (must have the type `Bool`). The second value and third value can be of any type. The result type is the least common supertype of the second and third value.

```
let x = 1 > 2 ? 3 : 4
// `x` is `4` and has type `Int`

let y = 1 > 2 ? nil : 3
// `y` is `3` and has type `Int?`
```


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