From 60947aaacded78b38f68b5b8cef1d76bd913ad21 Mon Sep 17 00:00:00 2001
From: Luca Palmieri <20745048+LukeMathWalker@users.noreply.github.com>
Date: Wed, 18 Dec 2024 16:53:14 +0100
Subject: [PATCH] Showcase else-if (#234)

---
 book/src/02_basic_calculator/03_if_else.md | 32 ++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/book/src/02_basic_calculator/03_if_else.md b/book/src/02_basic_calculator/03_if_else.md
index 3a6acfc..44a1270 100644
--- a/book/src/02_basic_calculator/03_if_else.md
+++ b/book/src/02_basic_calculator/03_if_else.md
@@ -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**.\