flow-control.js

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";
 default:
   return "You have an age"
 }
}