Javascript Math Floor Math Random

Math floor math random 10 1.

Javascript math floor math random.

In a nutshell one calls math floor when you want to truncate a decimal value to its nearest integer by just dropping the decimal portion. Try it yourself. Yes the results will be evenly distributed. When you add the min at the end you are adding the 2 to your range and end up with a random number from 2 to 10.

Description because floor is a static method of math you always use it as math floor rather than as a method of a math object you created math is not a constructor. Math floor null returns 0 not a nan. So 3 9 becomes 3 2 1 becomes 2 etc. Math floor math random max min 1 is generating a whole number between the range of 0 to 8.

The max min 1 is the logic that creates the range. The math random function returns a floating point pseudo random number in the range 0 to less than 1 inclusive of 0 but not 1 with approximately uniform distribution over that range which you can then scale to your desired range. The floor method rounds a number downwards to the nearest integer and returns the result. Math random will always generate a number that is strictly less than 1 i e 0 x 1 so math floor math random 255 will generate a random number between 0 and 254.

If the passed argument is an integer the value will not be rounded. So you would typically use that when you need an integer and you want the integer that is smaller than or equal to the decimal value.