Javascript Math Floor Decimal Places

3 tofixed seems unnecessary.

Javascript math floor decimal places.

We were able to round the float 2 333 to 2 decimal places. The string 9 01345 was rounded to 9 01. 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. Rounding numbers with decimal precision requires a little bit of calculation and math round optionally we can use the tofixed method that belongs to the number prototype.

If the passed argument is an integer the value will not be rounded. This is a solid answer. Unlike the other three math methods. The floor method rounds a number downwards to the nearest integer and returns the result.

A number can be rounded off to upto 2 decimal places using two different approaches in javascript. I d still output the result of the above using tofixed though so. Math floor math ceil and math round the way math trunc works is very simple. The tofixed method converts a number into a string rounding to a specified number of decimals.

A couple of improvements i can think of. 1 vs code typescript file doesn t like math round passing in a string. This rounded the number to 4 decimal places resulting in 383 4891. The number tofixed method takes an integer as an input and returns the the given number as a string in which the fraction is padded to the input integers length.

As you probably know weird precision things can happen with floating point values and on the other side of the spectrum if the number happens to be 15 sounds like the op wants 15 00. 2 make number of decimal places dynamic not hard coded to 2. Math floor value 100 100 tofixed 2. The output type of tofixed is a string which needs to be passed to a top level function called parsefloat to return a number unfortunately this seems to be really slow.

For 383 48910093 we changed the second parameter to 4. A number representing the largest integer less than or equal to the specified number. 1 that should solve the rounding issue. If the desired number of decimals are higher than the actual number zeros are added to create the desired decimal length.