Book Updates

-add chapter 3.2.1

Author: ktechhydle

.vitepress/config.mts

@@ -53,7 +53,7 @@ export default defineConfig({
                   items: [
                     {
                       text: "Chapter 3.2.1",
-                      link: "/book/chapter3.3",
+                      link: "/book/chapter3.2.1",
                     },
                   ],
                 },

book/chapter3.2.1.md

@@ -0,0 +1,59 @@
+---
+title: "Chapter 3.2.1"
+---
+
+# Chapter 3.2.1: Next and Leave
+
+In the last chapter, we explored `walk` and `while` loops and how to create them. GLang gives you further control of these loops with the `next` and `leave` keywords.
+
+## `next`
+
+If you want to skip to the next part of a loop (next iteration), you can use the `next` keyword anywhere in a `walk` or `while` loop.
+
+```
+# walk
+walk i = 0 through 10 {
+    if i == 5 {
+        next;
+    }
+
+    bark(i); # outputs 0, 1, 2, 3, 4, 6, 7, 8, 9 (skipping 5)
+}
+
+# while
+obj x = 0;
+
+while x != 10 {
+    if x == 4 {
+        next;
+    }
+
+    x = x + 1; # x is incremented as 0, 1, 2, 3, 4, 6, 7, 8, 9, 10
+}
+```
+
+## `leave`
+
+If you want to stop a loop, you can use the `leave` keyword anywhere in a `walk` or `while` loop.
+
+```
+# walk
+walk i = 0 through 10 {
+    if i == 5 {
+        leave;
+    }
+
+    bark(i); # outputs 0, 1, 2, 3, 4 (stopping at 5)
+}
+
+# while
+obj x = 0;
+
+while x != 10 {
+    if x == 4 {
+        leave;
+    }
+
+    x = x + 1; # x is incremented as 0, 1, 2, 3, 4
+}
+```