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 if (age > 19) {
    return "You are a grownup"
  }
}

function ternaryTeenager(age) {
  var returnString = age >= 13 && age <= 19 ? "You are a teenager" : "You are not a teenager"
  return returnString
}

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"
  }
}