Math.random in JS

Unity Engine
1

I’m trying to generate a random number in javascript and I’ve hit a very frustrating issue. According to every script I’ve ever done, as well as 5 different websites to verify my sanity, random is done in javascript using Math.random(). I have a min and max that I want for the random to fall under, so I put this function together:

function randint( beg, end )
{
    return Math.floor(((end - beg + 1)*Math.random()));
}

Unity returns an error:
unknown identifier ‘Math’.

I put together a script without the min/max to simplify things:

 function randint()
{
	var rand_no = Math.random();
	return rand_no;
}

unknown identifier: ‘Math’.

Is it my fault trying to code in the brain fog shortly after waking up, or is something seriously wrong here?

2

JS in Unity isn’t actually JavaScript, it’s an ECMAScript implementation Unity calls JavaScript for promotional purposes. It’s better thought of as UnityScript.

Unity provides a Random class; you should use Random.Range().

3

Ah, thanks for the response and the distinction. I’ll give that a shot when I get home tonight.

4

Random.value is a random number from zero to one, while Random.range is a random number from the min value to the max value. (num = Random.range(1.5, 4.5) or num = Random.value)

5

other Math functions are available via Mathf