🐅 Favourite Animal 🐐

⇦ Fundamentals Part 2

⇨ Problem Solving

Favorite Animal 1

Let’s discuss parameters and arguments in the context of the following example function:

function favoriteAnimal(animal) {
  return animal + " is my favorite animal!"
}

console.log(favoriteAnimal("Goat"))

Examples

I tried the following examples:
console.log(favoriteAnimal("cheetah"))

Assignment

Let’s write some functions! Write these in the script tag of a skeleton HTML file. If you’ve forgotten how to set it up, review the instructions from Fundamentals Part 1.

/**
 * 1 - Write a function called add7 that takes one number and returns that number + 7.
 * 2 - Write a function called multiply that takes 2 numbers and returns their product.
 * 3 - Write a function called capitalize that takes a string and returns that string with only the first letter capitalized
 *     Make sure that it can take strings that are lowercase, UPPERCASE or BoTh.
 * 4 - Write a function called lastLetter that takes a string and returns the very last letter of that string:
 *     lastLetter("abcd") should return "d"
 */

Solution

Description
/* Assignment */

// (1)
function add7(number) {
  return (number + 7);
}
console.log(add7(-42));
console.log(add7(0));
console.log(add7(42));

// (2)
function multiply(num1, num2) {
  return (num1 * num2);
}
console.log(multiply(42, 42));
console.log(multiply(5, "" + 2));
console.log(multiply(NaN, -42));

// (3)
function capitalize(str) {
  let firstLetterCapitalized;

  firstLetterCapitalized = str[0].toUpperCase();
  return (firstLetterCapitalized + str.substr(1));
}
let str = "hello Mama! i need to go home.";
console.log(str, " => ", capitalize(str));
str = "testing this out!"
console.log(str, " => ", capitalize(str));

// (4)
function lastLetter(str) {
  let lastIndex = str.length - 1;

  return str[lastIndex];
}
console.log(lastLetter("abcd"));
console.log(lastLetter("pulgamecanica"));
with ❤️ by pulgamecanica