javascript functions

Question 1

What is a function in JavaScript?

Answer 1

Functions allow you to package up code for use later in your program.

Question 2

Describe the parts of a function definition.

Answer 2

Function keyword 
the optional function name 
parameters ( zero or more )
Code block 
optional return statement

Question 3

Describe the parts of a function call.

Answer 3

function name
Parentheses
arguments

Question 4

When comparing them side-by-side, what are the differences between a function call and a function definition?

Answer 4

in a definition we define parameters

In a call we pass arguments

Question 5

What is the difference between a parameter and an argument?

Answer 5

parameter is a place holder

Argument is a value being passed into the function

Question 6

Why are function parameters useful?

Answer 6

they allow for different arguments or values to be passed into the function

Question 7

What two effects does a return statement have on the behavior of a function?

Answer 7

it stops the function’s code block / exits the function

causes the function to produce a value