Concept of Math.floor(Math.random() * 5 + 1), what is the true range and why?

Question

By multiplying the random number (which is between 0 and 1) by 5, we make it a random number between 0 and 5 (for example, 3.1841). Math.floor() rounds this number down to a

Answer 1

Math.Random() returns a number between 0 and 1, excluding 1.

So when you multiply it with 5, you get a number between 0 and 5 but not 5.

Math.floor() on this number rounds down to a whole number.

So numbers you will get are either 0, 1, 2, 3 or 4.

Adding 1 to this range gives you a number in [1, 2, 3, 4, 5].