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book/src/02_basic_calculator/03_if_else.md
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@ -36,6 +36,38 @@ if number < 5 {
}
```
### `else if` clauses
Your code drifts more and more to the right when you have multiple `if` expressions, one nested inside the other.
```rust
let number = 3;
if number < 5 {
println!("`number` is smaller than 5");
} else {
if number >= 3 {
println!("`number` is greater than or equal to 3, but smaller than 5");
} else {
println!("`number` is smaller than 3");
}
}
```
You can use the `else if` keyword to combine multiple `if` expressions into a single one:
```rust
let number = 3;
if number < 5 {
println!("`number` is smaller than 5");
} else if number >= 3 {
println!("`number` is greater than or equal to 3, but smaller than 5");
} else {
println!("`number` is smaller than 3");
}
```
## Booleans
The condition in an `if` expression must be of type `bool`, a **boolean**.\