flow-control.js

function basicTeenager(age) {
  if(age>=13 && age<=19) {
    return "You are a teenager!"
  } else{
    return undefined
  }
} 


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 (12>=age) {
    return "You are a kid"
  } else{ 
    return "You are a grownup"
  }

}

function ternaryTeenager(age) {
  if (age>=13 && age<=19) {
    return "You are a teenager"
  } else { 
    return "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"
  }
  
}