Comment: Rounding the number to retain two decimal places Aket 6799 0:46:18It is not necessary to rounding the number into and keep two decimal places. Use the following code.To directly use the roundto function, you must add math to uses.Roundto (1.

Adjust the decimal format, such as retaining the last two digits of the decimal point, the following articles collect some good implementation methods and share some of them. During the development process, we often encounter the need to adjust the

Example of PHP rounding, rounding, and using the round function. Example of using the PHP rounding, rounding, and round functions, and rounding the round decimal places: PHP keeps two decimal places and rounds them to copy the code as follows: $ n0.1

Reply content:Because binary floating-point numbers do not solve this problem.
First look at a phenomenon that is unrelated to round:
>>> def Show(x):... "" prints a number, 20-bit precision "" "... Print(' {:. 20f} '.format(x))...>>> Show(

0 reply content: this problem cannot be solved because of the binary floating point number.
Let's first look at a phenomenon that has nothing to do with round:
>>> Def show (x ):... "print a number, 20-bit precision """... print ('{:. 20f }'.

PHP rounding, rounding, round function Use example, rounding round
Decimal Example:
PHP reserved two decimal places and rounded
Copy the Code code as follows:$n = 0.1265489;Echo sprintf ("%.2f", $n); 0.13
As you can see, we used the sprintf

The integer function is often used. let's make a summary today! Actually, it's quite simple, just a few functions ~~ Major methods: ceil, floor, round, intval integer methods such as rounding, rounding, and ignoring decimals
There are four common

In the development process, you often encounter formatting to adjust decimals, such as two digits after the decimal point, and so on. Methods are also quite common, as is the memo below.
The first, using Math.Round
var original=28.453
1)//round

public static double round(double value, int scale,int roundingmode) { BigDecimal bd = new BigDecimal(value); bd = bd.setScale(scale,roundingmode); double d = bd.doubleValue(); bd = null; return d; }
Scale indicates the number of decimal places, and

Is the result of LUA calculation, you can see the result is very accurate.
Is the result of Python3 calculation, you can see that the calculation results are inaccurate:
The decimal calculation in JavaScript is not accurate, see this problem
Why are

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