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.
Floor to integer.
However factor can in fact be any number of the same sign as value e g.
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The floor method rounds a number downwards to the nearest integer and returns the result.
You want to round numbers.
Math floor null returns 0 not a nan.
A number representing the largest integer less than or equal to the specified number.
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This can be used for instance to round down to a particular denomination of currency e g.
0 25 or 0 05 usd.
Return the largest integer value that is equal to or less than 25 75.
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If the passed argument is an integer the value will not be rounded.
There are many ways of rounding.
To the nearest integer up down or toward zero.
The method floor gives the largest integer that is less than or equal to the argument.
This method has the following variants.