javascript-functions

Question 1

What is a function in JavaScript?

Answer 1

Collection of instructions that can be repeated.

Question 2

Describe the parts of a function definition.

Answer 2

1. Function keyword;
2. Function name (optional);
3. Zero or more parameters;
4. Code block enclosed within { };
5. Return (optional) statement.

Question 3

Describe the parts of a function call.

Answer 3

1. Function name;

2. Zero or more arguments within ( ).

Question 4

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

Answer 4

Function call takes arguments and function definition takes parameters and has the code block.

Question 5

What is the difference between a parameter and an argument?

Answer 5

Parameters are passed when defining the function and arguments are passed when calling the function.

Question 6

Why are function parameters useful?

Answer 6

Makes the functions more dynamic.

Question 7

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

Answer 7

Produces a value from the function and everything after the return statement is ignored.