javascript functions

Question 1

What is a function in javascript?

Answer 1

A statement that performs a task or calculates a value.

Question 2

Describe the parts of a function definition

Answer 2

Declaring function and a variable name (optional) and an opening curly brace for the start of the function. The statement, and a closing curly brace to close the function.

Question 3

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

Answer 3

Defining a function telling what the function will do when arguments are plugged in. Calling the function only needs the variable and the arguments.

Question 4

What is the difference between a parameter and an argument?

Answer 4

A parameter is a placeholder for arguments to be used in the function, and arguments are calling the function and plugging the values in.

Question 5

Why are function parameters useful?

Answer 5

It lets the function know where to plug in arguments. If there are no parameters, the function cannot do anything.

Question 6

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

Answer 6

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 running