test:zig

guide/language/loops-as-expressions.zig

@@ -0,0 +1,16 @@
+const expect = @import("std").testing.expect;
+// Like `return`, `break` accepts a value. This can be used to yield a value from a loop.
+// Loops in Zig also have an `else` branch, which is evaluated when the loop is not exited with a `break`.
+
+fn rangeHasNumber(begin: usize, end: usize, number: usize) bool {
+    var i = begin;
+    return while (i < end) : (i += 1) {
+        if (i == number) {
+            break true;
+        }
+    } else false;
+}
+
+test "while loop expression" {
+    try expect(rangeHasNumber(0, 10, 3));
+}