Random

Math.random() generates a random number between 0 and 0.999...

0.45951762031142884

Math.random() * 10 generates a random number between 0 and 9.999...

4.595176203114288

Math.floor(Math.random() * 10) generates a random whole number between 0 and 9

4

To generate a random number in a different range, multiply Math.random() by a different number.