Also, when you declare a function, the things in parentheses should be variable names inside the function, where you will store the passed to the function.
function sayHi(name) {
console.log('Hi, ', name)
}
sayHi('Bob')
That will output "Hi, Bob" because we passed it a string “Bob”, that got accepted by the function and stored in a variable called “name” and then got used in the function.