Module-JS1/week-3/refactor/is-vowel.js at ff2c9994f6aeb75cad97a09270558511a8cce014 · CodeYourFuture/Module-JS1 · GitHub

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function isVowel(letter) {
  return (
    letter === "a" ||
    letter === "e" ||
    letter === "i" ||
    letter === "o" ||
    letter === "u"
  );
}

// here is an implementation of isVowel - this function checks if a letter is a vowel

let letter = "a";

console.log(
  "It is " +
    (isVowel(letter) ? "true" : "false") +
    " that letter '" +
    letter +
    "' is a vowel."
);

// console.log("case: letter a...");
const currentOutput = isVowel("a");
const targetOutput = true;
console.assert(
  currentOutput === targetOutput,
  "current output: %s, target output: %s",
  currentOutput,
  targetOutput
);

letter = "e";

console.log(
  "It is " +
    (isVowel(letter) ? "true" : "false") +
    " that letter '" +
    letter +
    "' is a vowel."
);

// console.log("case: letter e...");
const currentOutput2 = isVowel("e");
const targetOutput2 = true;
console.assert(
  currentOutput2 === targetOutput2,
  "current output: %s, target output: %s",
  currentOutput2,
  targetOutput2
);

letter = "k";

console.log(
  "It is " +
    (isVowel(letter) ? "true" : "false") +
    " that letter '" +
    letter +
    "' is a vowel."
);

// console.log("case: letter k...");
const currentOutput3 = isVowel("k");
const targetOutput3 = false;
console.assert(
  currentOutput3 === targetOutput3,
  "current output: %s, target output: %s",
  currentOutput3,
  targetOutput3
);