setScale returns a new BigDecimal with the result, it doesn’t change the instance you call it on. So assign the return value back to value: value = value.setScale(0, RoundingMode.UP); Live Example I also changed it to RoundingMode.UP because you said you always wanted to round up. But depending on your needs, you might want RoundingMode.CEILING … Read more
Since C++11, one can use fesetround(), the floating-point environment rounding direction manager. There are four standard rounding directions and an implementation is permitted to add additional rounding directions. #include <cfenv> // for fesetround() and FE_* macros #include <iostream> // for cout and endl #include <iomanip> // for setprecision() #pragma STDC FENV_ACCESS ON int main(){ int … Read more
The first step would be to define the colors you want to compare to. The second step is to find the smallest distance from your color to one of the colors you chose in the previous step. In order to be able to measure that distance you need an Euclidian space in which to model … Read more
Since 0.17.0 version you can do .round(n) df.round(2) 0 1 2 3 0 0.06 0.67 0.77 0.71 1 0.80 0.56 0.97 0.15 2 0.03 0.59 0.11 0.95 3 0.33 0.19 0.46 0.92 df 0 1 2 3 0 0.057116 0.669422 0.767117 0.708115 1 0.796867 0.557761 0.965837 0.147157 2 0.029647 0.593893 0.114066 0.950810 3 0.325707 0.193619 … Read more
Seems like you need the floor: import math math.floor(a * 100)/100.0 # 28.26
Here is a simple function to do it: function abbrNum(number, decPlaces) { // 2 decimal places => 100, 3 => 1000, etc decPlaces = Math.pow(10,decPlaces); // Enumerate number abbreviations var abbrev = [ “k”, “m”, “b”, “t” ]; // Go through the array backwards, so we do the largest first for (var i=abbrev.length-1; i>=0; i–) … Read more
Use Math.Ceiling(87.124563563566) or Math.Floor(87.124563563566) for always rounding up or rounding down. I believe this goes to the nearest whole number.
The first and most important rule: use a decimal data type, never ever binary floating-point types. When exactly rounding should be performed can be mandated by regulations, such as the conversion between the Euro and national currencies it replaced. If there are no such rules, I’d do all calculations with high precision, and round only … Read more
The round function returns an integer if the second argument is not specified, else the return value has the same type as that of the first argument: >>> help(round) Help on built-in function round in module builtins: round(number, ndigits=None) Round a number to a given precision in decimal digits. The return value is an integer … Read more