add loop advanced

Author: ziteh

loop_advanced/expression.zig

@@ -0,0 +1,16 @@
+const print = @import("std").debug.print;
+
+pub fn main() void {
+    const target = 5;
+    const list = [_]u8{ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
+    var index: u8 = 0;
+
+    // Loop as expression
+    const value = while (index < list.len) : (index += 1) {
+        if (list[index] == target) {
+            break true;
+        }
+    } else false; // 如果到最後都沒有執行到 break 則會回傳 else 的值
+
+    print("{}", .{value});
+}

loop_advanced/inline.zig

@@ -0,0 +1,13 @@
+const print = @import("std").debug.print;
+
+pub fn main() void {
+    const max = 10;
+    comptime var i = 0;
+
+    var sum: u16 = 0;
+    inline while (i <= max) : (i += 1) {
+        sum += i;
+    }
+
+    print("{}", .{sum});
+}

loop_advanced/readme.md

@@ -0,0 +1,11 @@
+# Loops Advanced
+
+```bash
+$ zig run expression.zig
+true
+```
+
+```bash
+$ zig run inline.zig
+55
+```