A ceil is a function that gets a value upward;
Floor is the function of rounding out the decimal place to get a value;
Round is a function that is used for rounding.
CeilDefinition and Usage:
The Ceil () function rounds up to the nearest
SyntaxRound (x, prec) parameter descriptionX is optional. Specifies the number to be rounded.Prec is optional. Specifies the number of digits after the decimal point.DescriptionReturns the result of rounding x to the specified precision prec (number
-- Round-- Returns a numeric expression rounded to the specified length or precision.---- Syntax-- Round (numeric_expression, length [, function])---- Parameter-- Numeric_expression---- Expression of exact or approximate numeric data type (except
The comparison between the round () function and trunc () function in Oracle is very practical.
Round (x [, y])
[Function] returns the rounded value.
[Parameter] x, y, numeric expression. If y is not an integer, the y integer is truncated. If y
I don't understand, do you study? If you remember.public static long round (double a) {Long longbits = Double.doubletorawlongbits (a); Long Biasedexp = (Longbits & doubleconsts.exp_bit_mask) >> (doubleconsts.significand_width-1); Long
Ceil is a function of rounding up to get a value;Floor is a function of dropping a decimal bit to get a value;Round is a function for rounding.
CeilDefinition and Usage:The Ceil () function is rounded up to the nearest integer.
Copy Code code
Round function Usage:
Intercept numbersThe format is as follows: ROUND (Number[,decimals])Where number is to be interceptedDecimals indicates the number of digits that need to be retained after the decimal point. Optional, ignore it to truncate all
X, is the floating-point data to be processedPrec, save a few decimal placesTips and commentsNote: PHP does not correctly handle strings similar to "12,300.2" by default.
Note: The Prec parameter was introduced in PHP 4.
*/
The truncated function
Round (X[,y])
"Function" returns the rounded value
Parameter x,y, numeric expression, if Y is not an integer, intercepts the y-integer portion, if y>0 is rounded to Y-decimal, and if Y is less than 0, rounded to the decimal point to the left.
"Back"
Phpround problems (incorrect precision results) php
It is found that there is a problem when using the PHP round function for decimal control, as shown below:
Expected value of round (9999999999999.99, 2): 9999999999999.99; actual value: 1000000000
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 function can be rounded, it is a rounding function, the following is a look at the syntax of round:1 Math.Round (number)Let's look at a few examples:
The code is as follows
Copy Code
1 document.write
Round Function syntax
Math.Round(X); Round Function Parameters
X -- number of The number type
Returned value of the Round Function
Returns the nearest integer of X. If the decimal part of X is greater than or equal to 0.5, the return
Usually using WPS Mobile version of the table, found that in the statistical data process, in many cases to be rounded to the decimal point two decimal digits. Rounding is not possible with cell formatting. In the WPS mobile version, to
rounding a number that contains a decimal point is a common requirement. Similar rounding functions are also available in C + +. There are floor () and ceil () functions in the header file of C + +. There is also a round () function in the STL. The
ASP has two functions that can be used as rounding functions: the round function and the formatnumber function.Round Function
Returns the value rounded to the specified number of digits.
Round (expression [,
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
Oracle time operations (date truncation and rounding) are similar to rounding numbers and bitwise truncation. Oracle also provides these two functions for time and date. But it is more complicated than rounding and intercepting numbers: this is
This article mainly introduces the round function code in PHP (floor function, ceil function, round and intval), has a certain reference value, now share to everyone, the need for friends can refer to
When working with floating-point numbers in PHP,
Iamlaosonghttp://blog.csdn.net/iamlaosong/article/details/18458253The function that takes the current date in VBA is date, the function of the current time is now, and the current date and time are now. the functions for converting dates to years
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