Javascript Math Floor Vs Round

This tutorial teaches java math class with examples. A number representing the largest integer less than or equal to the specified number. 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.

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Math floor rounds the number generated by math random down to the last integer meaning that it would always just round down to 0.

Javascript math floor vs round.

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. If you want to generate a random number between 0 and 2 take the following examples. Math floor just rounds down to the nearest integerer while math round searches for the nearest integer. For accurate results please disable firebug before running the tests.

When it comes to generating random numbers though math floor has a more even distribution than math round. The floor method rounds a number downwards to the nearest integer and returns the result. This method accepts single parameter asmentioned above and described below. Math floor always rounds down to the nearest integer while math round will round up or down depending on what side of 5 the number falls on.

When you feed math round a 500000 value it will round to the nearest even integer if i recall correctly. In essence it is floor number number modulus 1. Javascript object oriented programming programming. 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.

Test case created by on 2011 12 8. Java math class provides useful methods for performing the math s operations like exponential logarithm roots and trigonometric equations too. 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.

Floor will always round down. Towards the lesser value. Math floor x parameters x a number. Math round vs math ceil vs math floor javascript performance comparison.

If the passed argument is an integer the value will not be rounded. So the basic answer is that you use which one gets the result you expect.