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

Note that:

• 0 <= Math.random() **<** 1
• Math.floor(x.yz) = x

And therefore, the number given is a integer in the interval:

x = Math.floor((0..0.999999999) * 5 + 1)
x = (0..4) + 1