Javascript-functions

Question 1

What is a function in Javascript?

Answer 1

code block perform action

Question 2

Describe the parts of a function definition

Answer 2

1. function
2. function name example: hello
3. parameter ()
4. the start of the function code block { opening curly brace
   5/ optional return statement
5. the end of the function block } closing curly brace

Question 3

Describe the parts of a function call

Answer 3

1. function name
2. () arguments
   sayHello();

Question 4

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

Answer 4

function definition tells what the code is expected to do. 
calling it excute the action of the function

Question 5

What is the difference between a parameter and an argument?

Answer 5

parameter= holds the value in function definition ( a placeholder) 
argument = passed though function call

Question 6

Why are function parameters useful?

Answer 6

alter behaviors that is pass in

Question 7

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

Answer 7

1. produce a value

2. prevents any more code in the function’s code block from being run