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Basic functions in unitscript

I have only the main question. I am trying to learn how to use functions with singlescript, and I found out that when you create a function using something like

function Example(text)
{
    print(text);
}

and then call it using

Example();

you can insert a string or number in parentheses on the last piece of code in parentheses, and it will go through and insert itself into a previously created function. In this case, it prints everything that I type in parentheses.

Now, my question is: if this works, then why are there no functions in which I pass two numbers, and ask them to add work? The code I'm trying to use looks like this:

Addition(4, 4);
function Addition(a, b)
{
    print(a+b);
}

When I try to accomplish this, Unity tells me

The + operator cannot be used on the left side of the Object type and the right side of the Object type.

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+5
2

, Unity :

Addition(4, 4);
function Addition(a:int, b:int)
{
    print(a+b);
}

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