JavaScript Functions Worksheet

Question 1

What is a function, and why would you ever want to use one in your code?

A function is a code that can be reused multiple times and perfom specific tasks. You would want to use this as code reuseability.

Question 2

What do you call the values that get passed into a function?

Arguments.

Question 3

What is the 'body' of a function, and what are the characters that enclose the body of a function?

It is the block of code the defines what the function does.

Question 4

What does it mean to 'call', or 'invoke' a function (note that 'calling' and 'invoking' a function mean the same thing)?

It means executing the function so that the code inside the body will run.

Question 5

If a function has more than one parameter, what character do you use to separate those parameters?

A comma.

Question 6

What is the problem with this code (explain the syntax error)?


function convertKilometersToMiles(km)
    return km * 0.6217;
}

It is missing the first curly braces that is missing.

Question 7

In the code below, there are two functions being invoked. Which one returns a value? Explain why you know this.


const name = prompt("Enter your name");
alert("Hello " + name + "!");

const name will return a value. Because the const prompt will return a value.

Coding Problems

Always test your work! Check the console log to make sure there are no errors.