JS week 1 day 2

Question 1

What is a function in JavaScript?

Answer 1

A function in JavaScript is similar to a procedure—a set of statements that performs a task or calculates a value

Question 2

Describe the parts of a function definition.

Answer 2

function keyword, optional name, 0 or more parameters separated by commas surround by parentheses, opening curly brace, optional return statement, closing curly brace.

Question 3

Describe the parts of a function call.

Answer 3

function’s name, 0 or more arguments separated by commas surrounded by parentheses.

Question 4

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

Answer 4

function definition only defines a function and calling the function returns the result of task written inside of the function.

Question 5

What is the difference between a parameter and an argument?

Answer 5

parameter is a placeholder, argument is the actual value that is passed into the function.

Question 6

Why are function parameters useful?

Answer 6

parameters make the function reusable.

Question 7

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

Answer 7

1. Causes the function to produce a value we can use in our program.
2. Prevents any more code in the function’s code block from being run.