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
This article is the official HTML5 training course for h5edu institutions, mainly introduces: JavaScript intensive tutorial--javascript Math (Arithmetic) object The function of the Math object is: Perform common arithmetic tasks. Round () How to use
The round () method returns the decimal point of a numeric value rounded to n digits.
Grammar
The following is the syntax for the Round () method:
Round (x [, N])
Parameters
X-This is a numeric value that represents the value that needs to be
Round () Rounding out the js Banker algorithm, round banker
First, let's guess the result returned by round (0.825, 2,
First, SQL server Returns 0.83
The returned result of js is 0.83. The code is as follows:
Var B = 0.825; alert (Math. round (B * 1
Decimal Example:
PHP retains two decimal places and rounded up
Copy Code code as follows:
$n = 0.1265489;
Echo sprintf ("%.2f", $n); 0.13
You can see we used the sprintf function to format the $n%.2f is the target format,
In math. when performing data processing, round often encounters a situation where 81.25 retains a decimal number, and the value is 81.2. It is searched by material and math. the round rounding algorithm adopts the banker's rounding algorithm, which
Ceil is a function for getting a value from the up position; floor is a function for rounding out the decimal places to get a value; round is a function for rounding out. Ceil definition and usage: the ceil () function rounds up to the nearest
Round
See
Returns the number rounded up by the specified number.
Syntax
Round(Number,Num_digits)
Number.
The number of digits specified by num_digits.
Description
If num_digits is greater than 0, it is rounded to
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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