Math and random numbers in JavaScript

1.math.random (); The result is a random number between 0-1 (including 0, excluding 1)
2.math.floor (num); The parameter num is a numeric value and the function result is the integer portion of Num.
3.math.round (num); The parameter num is a numeric value and the function result is the integer after num is rounded.

Math: A Mathematical object that provides a mathematical calculation of the data.
Math.random (); Returns a random number between 0 and 1 (including 0, excluding 1).

Math.ceil (n); Returns the smallest integer greater than or equal to N.
With Math.ceil (Math.random () *10), a random integer of 1 to 10 is obtained, with a minimum probability of 0 being taken.

Math.Round (n); Returns the value of an integer after n rounding.
With Math.Round (Math.random ()), a random integer from 0 to 1 can be obtained evenly.
With Math.Round (Math.random () *10), a basic equalization can be obtained for random integers from 0 to 10, where the probability of obtaining a minimum of 0 and a maximum of 10 is less than half.

Math.floor (n); Returns the largest integer less than or equal to N.
With Math.floor (Math.random () *10), a random integer from 0 to 9 can be obtained evenly.

Math and random numbers in JavaScript