Javascript Math Floor Vs Math Round

Revision 8 of this test case created by john david dalton on 2011 6 29 and last updated on 2011 10 14.

Javascript math floor vs math round.

Test case created by on 2011 12 8. Math round math round method round off number passed as parameter to its nearest integer so as to get lower value. For accurate results please disable firebug before running the tests. Math round vs math ceil vs math floor javascript performance comparison.

This method accepts single parameter asmentioned above and described below. 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. It is the value which is to be tested for math floor. Because ceil is a static method of math you always use it as math ceil rather than as a method of a math object you created math is not a constructor.

While both successfully round off its containing parameter to an integer within the designated range math floor does so more evenly so the resulting integer isn t lopsided towards either end of the number spectrum what is the real difference. The floor method rounds a number downwards to the nearest integer and returns the result. Towards the lesser value. A number representing the largest integer less than or equal to the specified number.

If the passed argument is an integer the value will not be rounded. 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 x parameters x a number. Syntax math ceil x parameters x a number.

Math round math floor rounds the number generated by math random down to the last integer meaning that it would always just round down to 0. 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. Math floor vs math round vs parseint vs bitwise javascript performance comparison. In the below example when a number 5 34 passed as a parameter math round round off it in to 5 which is a lower value than actual number.