diff --git a/flow-control.js b/flow-control.js
index 1e28c3aa0e..db68a36903 100755
--- a/flow-control.js
+++ b/flow-control.js
@@ -1,19 +1,40 @@
 function basicTeenager(age) {
-
+  if (age >= 13 && age <= 19) {
+    return 'You are a teenager!';
+  }
 }
 
 function teenager(age) {
-
+  if (age >= 13 && age <= 19) {
+    return 'You are a teenager!';
+  }
+  return 'You are not a teenager';
 }
 
 function ageChecker(age) {
-
+  if (age >= 13 && age <= 19) {
+    return 'You are a teenager!';
+  } else if (age <= 12) {
+    return 'You are a kid';
+  }
+  return 'You are a grownup';
 }
 
 function ternaryTeenager(age) {
-
+  return age >= 13 && age <= 19 ? 'You are a teenager' : 'You are not a teenager';
 }
 
 function switchAge(age) {
-
+  switch(age) {
+    case 13:
+    case 14:
+    case 15:
+    case 16:
+    case 17:
+    case 18:
+    case 19:
+      return 'You are a teenager';
+    default:
+      return 'You have an age';
+  }
 }