Python built-in functions (55) -- round, python built-in 55 round
English document:
round(
Number[,
Ndigits])
Return the floating point value
NumberRounded
NdigitsDigits after the decimal point. If
NdigitsIs omitted, it
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.
Https://www.cnblogs.com/herbert/p/3402245.htmlBasisThe floating-point number is represented by the machine's double-precision (a-bit) of the floating-point number. provides approximately 17 bits of precision and ranges from 308 to 308 of the
Introduction
Today and test communication a percent calculation method encountered a problem, I used a strong cast in the stored procedure (32.678 as DECIMAL (5,1)) I think the method will only hold a decimal number, and my response to the test is
In C #, Division does not retain the decimal point by default,
Decimal result = 100/1000; // result = 0;
The decimal point must be retained.
Decimal result = 100 m/1000;
M represents decimal.
What should I do if it is a variable? This
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
Turn http://kwon.iteye.com/blog/1068255 http://blog.csdn.net/tvvbbb/article/details/47256943public static string decimaltostring (decimal D){Return d.tostring ("#0. ######");}This display is very simple to a few examples to understand, notice the
English documents:
round
(number[, ndigits])
Return The floating point value
number rounded to
ndigits digits after the decimal point. If
ndigits is omitted, it returns the
Round (X,[n]) rounding n reserved fractional number1, when n is not filled, the default is 0, that is, the decimal part is not retainedA, when the fractional part is only 0.5 when the integer part if it is an odd number in 1, if even the fractional
Fix (number) and Int (numbers) are integral parts of the returned digits.
When number is positive, the two return the same value. For example: Fix (3.6) =3,int (3.6) = 3.
When number is negative, Fix removes the decimal part directly, and INT
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