Add control-flow examples for while until and loop control

Author: mgomes

ROADMAP.md

@@ -233,7 +233,7 @@ Goal: improve language ergonomics for complex script logic and recovery behavior
 - [x] Add parser/runtime tests for each new control flow construct.
 - [x] Add nested control flow tests for edge cases.
 - [x] Add docs updates in `docs/control-flow.md` and `docs/errors.md`.
-- [ ] Add examples under `examples/control_flow/` for each new feature.
+- [x] Add examples under `examples/control_flow/` for each new feature.
 
 ### v0.16.0 Definition of Done
 

examples/control_flow/loop_control.vibe

@@ -0,0 +1,19 @@
+def odds_below(limit)
+  out = []
+  n = 0
+  while n < limit
+    n = n + 1
+    if n == limit
+      break
+    end
+    if n % 2 == 0
+      next
+    end
+    out = out + [n]
+  end
+  out
+end
+
+def run()
+  odds_below(10)
+end

examples/control_flow/until_loop.vibe

@@ -0,0 +1,13 @@
+def collect_until(limit)
+  out = []
+  n = 0
+  until n >= limit
+    out = out + [n]
+    n = n + 1
+  end
+  out
+end
+
+def run()
+  collect_until(5)
+end

examples/control_flow/while_loop.vibe

@@ -0,0 +1,13 @@
+def countdown(start)
+  out = []
+  n = start
+  while n > 0
+    out = out + [n]
+    n = n - 1
+  end
+  out
+end
+
+def run()
+  countdown(5)
+end