Calculator

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Define 4 functions:

// Define the 4 functions here
function sum (x, y) {
    return x + y;
}

function subtract(x,y) {
    return x - y;
}

function multiply(x,y) {
    return x * y;
}

function divide(x,y) {
    return x / y;
}

Get number of characters, UPPER and lower

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Define these 3 functions

// Define the 3 functions here
function getNumberOfChars(input) {
    return input.length;
}

function getLower(input) {
    return input.toLowerCase();
}
function getUpper(input) {
    return input.toUpperCase();
}

Shopping List

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You need to write the following function to make it work:

getMessage that takes 1 parameter and returns a string depending on the value of that parameter:

• When the number is below 0 (for example -1, -2, etc.), we want to show the message Invalid number
• When the number is 0, show the message: You don't have any items in your shopping list
• When the number is 1, show the message: You have one item in your shopping list
• When the number is above 1, show the message: You have more than 1 item in your shopping list

// Define the function here
function getMessage(input) {
    if (input < 0) {
        return "Invalid number"
    }
    if (input === 0) {
        return "You don't have any items in your shopping list"
    }
    if (input === 1) {
        return "You have one item in your shopping list"
    }
    if (input > 1) {
        return "You have more than 1 item in your shopping list"
    }
}