index.js

/* Example Challenge
 * Print out "hello world" in the console
 *
 * Steps:
 * 1. Use `console.log` to print out "hello world"
 *
 * Example Output: "hello world"
 */

console.log('hello world')

/* Challenge #1
 * Create a variable and print the value
 *
 * Steps:
 * 1. Create a variable and assign it any value
 * 2. Use `console.log` to print out your variable
 *
 * Example Output: n/a
 */

// TODO: ADD CODE HERE

let myVariable = 1234;
console.log(myVariable);

/* Challenge #2
 * Create variables for your first and last name then print your full name
 *
 * Steps:
 * 1. Create a variable called `firstName` and assign your first name as the string value
 * 2. Create a variable called `lastName` and assign your last name as the string value
 * 3. Use `console.log` to print out your full name (make sure there's a space!)
 *
 * Example Output: "Elizabeth Thompson"
 */

// TODO: ADD CODE HERE
let firstName = 'Kon';
let lastName = 'Ham';
console.log(firstName + ' ' + lastName);

/* Challenge #3
 * Calculate the total price rounded to two decimals
 *
 * Steps:
 * 1. Create a variable called `price` and assign a float value (ex. 9.98)
 * 2. Create a variable called `quantity` and assign an integer value (ex. 5)
 * 3. Create a variable called `total` and assign the value of `price` multiplied by `quantity`
 * 4. Use `console.log` to print out the `total` (rounded to the nearest two decimals)
 *
 * Example Output: "$49.90"
 */

// TODO: ADD CODE HERE
let price = 9.98;
let quantity = 71;
let priceAndQuantityMult = price * quantity;
let total = priceAndQuantityMult.toFixed(2);
console.log(`$${total}`);

/* Challenge #4
 * Declare a variable and conditionally assign it a value
 *
 * Steps:
 * 1. Create a variable called `weather` and assign "Rainy" as the string value
 * 2. Declare a variable called `message` and don't assign it a value
 * 3. Create a conditional statement that checks if `weather` is equal to "Sunny"
 * 4. If `weather` meets the condition above, then set `message` equal to "Yay! It's sunny outside"
 * 5. Add an `else` clause that sets `message` equal to "Aww! It's not sunny outside"
 * 6. Use `console.log` to print out the value of `message`
 *
 * Example Output: "Aww! It's not sunny outside"
 */

// TODO: ADD CODE HERE
let weather = 'Rainy';
let message;

if (weather == 'Sunny') {
    message = 'Yay! It\'s sunny outside';
} else {
    message = 'Aww! It\'s not sunny outside';
}

console.log(message);

/* Challenge #5
 * Create a function that returns any string
 *
 * Steps:
 * 1. Create a function called `myFunction` using the function keyword
 * 2. Add a return statement in your function which returns a random string
 * 3. Use `console.log` to print out the output of `myFunction()`
 *
 * Example Output: "I called a function!"
 */

// TODO: ADD CODE HERE
function myFunction() {
    let randomString = 'This is a random string. But where\'s the yarn?';
    return randomString;
}
console.log(myFunction());

/* Challenge #6
 * Rewrite the function in Challenge #5 as an arrow function
 *
 * Steps:
 * 1. Create a function called `myArrowFunction` using the arrow syntax
 * 2. Add a return statement in your function which returns a random string
 * 3. Use `console.log` to print out the output of `myArrowFunction()`
 *
 * Example Output: "I called an arrow function!"
 */

// TODO: ADD CODE HERE
const myArrowFunction = () => {
    let randomString = 'This is a random string. But where\'s the yarn?';
    return randomString;
}
console.log(myArrowFunction());

/* Challenge #7
 * Create a function that accepts a string argument and returns it in all uppercase
 *
 * Steps:
 * 1. Create a function called `stringToUpper`
 * 2. Add a parameter called `str` in your function signature
 * 3. Add a return statement in your function which returns the input string in all uppercase letters
 * 4. Use `console.log` to print out the output of `stringToUpper(str)`
 *
 * Example Output: "WHY AM I SCREAMING"
 */

// TODO: ADD CODE HERE
const stringToUpper = (str) => {
    return str.toUpperCase();
  }
  console.log(stringToUpper('when i wear hearing protection i start yelling because i can\'t hear myself.'));

/* Challenge #8
 * Create a function that accepts a number argument and returns double its value
 *
 * Steps:
 * 1. Create a function called `multiplyByTwo`
 * 2. Add a parameter called `number` in your function signature
 * 3. Add a return statement in your function which returns `number` times two
 * 4. Create a variable called `num1` and assign it to the result of `multiplyByTwo(1)`
 * 5. Create a variable called `num2` and assign it to the result of `multiplyByTwo(5)`
 * 6. Create a variable called `num3` and assign it to the result of `multiplyByTwo(10)`
 * 7. Use `console.log` to print out the value of `num1`, `num2`, and `num3`
 *
 * Example Output: 2, 10, 20
 */

// TODO: ADD CODE HERE
const multiplyByTwo = (number) => {
    return number * 2;
}

let num1 = multiplyByTwo(1);
let num2 = multiplyByTwo(5);
let num3 = multiplyByTwo(10);

console.log(num1, num2, num3);