JavaScript Functions Worksheet

Question 1

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

Code that allows you to repeat a line of code.
This is helps so you don't have to type out the same code over and over agian.

Question 2

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

Calling/Invoking the Function

Question 3

Do all functions return a value? (Note: this is a bit of a trick question - make sure to ask me about this in class.)

Question 4

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

The code that will be executed when the function is called in {} (Currly Braices)

Question 5

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

it just means your executed the body of the function when the function is called

Question 6

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

a comma

Question 7

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


function convertKilometersToMiles(km)
    return km * 0.6217;
}

There is closing Currly Bracket

Question 8

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 + "!");

it would be prompt that would return a value of whatever the user inputed and stored in variable name

Coding Problems

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