Javascript Math Floor Vs Round

So the basic answer is that you use which one gets the result you expect.

Javascript math floor vs round.

It is the value which is to be tested for math floor. Math ceil and math round methods differ in a way that the former round off a number to its nearest integer in upward direction of rounding towards the greater value whereas the latter round off a number to its nearest integer in downward direction of rounding towards lower value. The math floor method is used to round off the number passed as a parameter to its nearest integer in downward direction of rounding i e. When you feed math round a 500000 value it will round to the nearest even integer if i recall correctly.

If the passed argument is an integer the value will not be rounded. Wouldn t math round be a better choice for the youhit variable since it would round to 0 if 5 and up to 1 if 5 causing a random pattern of 1 s and 0 s. If you want to generate a random number between 0 and 2 take the following examples. 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.

For accurate results please disable firebug before running the tests. This tutorial teaches java math class with examples. Math floor x parameters x a number. Floor will always round down.

The floor method rounds a number downwards to the nearest integer and returns the result. Javascript object oriented programming programming. A number representing the largest integer less than or equal to the specified number. In essence it is floor number number modulus 1.

When it comes to generating random numbers though math floor has a more even distribution than math round. Math floor just rounds down to the nearest integerer while math round searches for the nearest integer. Math floor rounds the number generated by math random down to the last integer meaning that it would always just round down to 0. Math round vs math ceil vs math floor javascript performance comparison.

Towards the lesser value. This method accepts single parameter asmentioned above and described below.