Function Parameters

Question

What exactly are function parameters? How do they work?

I know there's more to parameters than just this:

function Test(a, b) {
alert(a + b);
)

Test("Hello ", "World!");

Take this code I wrote for example:
https://code.sololearn.com/WsEXgBv9x9Xx/?ref=app

I have no idea what a and b are in the second function.

The point is, I know very little about parameters and they have me confused when I see them in complex Javascript.

Answer 1

sort function uses compare function to make comparison in the sort algorithm. 2 compare input parameters are needed, must be a and b. if return a-b will generate ascending order sorted array, else if return b-a will generate descending order sorted array.

Answer 2

Function :

Function are used to reduce code in your program.

For example :

Suppose your program is based on adding numbers.

Instead of doing addition every time , you can define function once and call it as many times as you want.

Examples :

function add(a,b)
{
console.log(a+b);
}

add(1,2) //ans 3
add(5,9) //ans 14
and so on...

Hope this helps you.

Answer 3

But what exactly is a and b in the sort function?

Parameters are so confusing to me xD