js_function_notation.md

Function notations

Functions are all over javascript and they vary in form. This guide (and challenge) will help you with recognising the different function notations.

// declarative function
function add(x, y) {
    return x + y
}

// pointing to another function e.g. pointing to add
const myAdd = add

// variable with an anonymous function expression (as value)
const add = function() {
    return x + y
}

// arrow functions multiline
const add = (x, y) => {
    return x + y
}

// single line arrow functions
const add = (x, y) => x + y

// implicit return over multiple lines
const add = (x, y) => (
    x + y 
)

Challenge

Duplicate the above code but for multiply, divide, subtract

Be sure to test one at a time (since declaring something twice will break execution)