diff --git a/flow-control.js b/flow-control.js
index 1e28c3aa0e..ce3a0aceb7 100755
--- a/flow-control.js
+++ b/flow-control.js
@@ -1,19 +1,43 @@
 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!';
+  } else {
+    return 'You are not a teenager';
+  }
 }
 
 function ageChecker(age) {
-
+  if (age >= 13 && age <= 19) {
+    return 'You are a teenager!';
+  } else if (age < 13) {
+    return 'You are a kid';
+  } else {
+    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';
+    break;
+  default:
+    return 'You have an age';
+  }
 }