how to round up decimal numbers

Http://www.cnblogs.com/kingwolfofsky/archive/2011/07/21/2112299.html floating point numbers 1. What are floating point numbers In the process of computer system development, several methods have been proposed to express real numbers. Typically, for

Comparison of NUMERIC and DECIMAL types in Mysql, numericdecimal Decimal (numeric) is synonymous and used to precisely store values. A decimal data type can store up to 38 numbers. All numbers can be placed on the right of the decimal point. The

Floating point Type name cts Type description significant Figures range (approximate) float system.single 32-bit single-precision floating point 7

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

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

Transferred from: http://www.cnblogs.com/lovewife/articles/2466543.htmlSingle precision refers to a 4-byte floating-point number, which is the floatA double is a 8-byte floating-point number, which is doubleDecimal is a high precisionFloating point

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

Numbers, cardinality and representations integerIntegers are these familiar numbers ...,-1, 0, +1, +2, .... Integer values are also referred to as ' complete ' and are divided into positive numbers (1 to infinity), negative numbers (-1 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

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