Javascript-functions

Question 1

What is a function in JavaScript?

Answer 1

A function is a set of codes that can perform a task and can be used repeatedly.

Question 2

Describe the parts of a function definition.

Answer 2

It consists of a function keyword, a function name, zero or more parameters surrounded by parentheses and separated by commas, and the curly braces to contain the function code block.

Question 3

Describe the parts of a function call.

Answer 3

function name, parentheses with zero or more arguments.

Question 4

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

Answer 4

A function definition starts with a function keyword, function name with zero or more parameters, then the curly braces to contain the function code block. A function call only needs the function name, followed by the parentheses to contain zero or more arguments.

Question 5

What is the difference between a parameter and an argument?

Answer 5

parameter is like a placeholder, like a variable whose value is unknown. An argument is the value we pass to the function.

Question 6

Why are function parameters useful?

Answer 6

you van pass many different values to the function to produce different outcomes.

Question 7

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

Answer 7

1) it causes the function to produce a value.

2) prevent other codes in the function code block from being run.