what natural logarithm

MySQL automatically transforms numbers into strings when necessary, and vice versa:Mysql> Select 1+ "1"; -2 mysql> SELECT CONCAT (2, ' test '); ' 2 test 'If you want to explicitly transform a number into a string, pass it as an argument CONCAT() .If

First, ABSABS (x)Returns the absolute value of XSecond, Bin/oct/hexBIN (x)Returns the binary of X (Oct returns octal, HEX returns hex)Third, Ceiling/floorCEILING (x): Returns the smallest integer value greater than XFloor (x): Returns the maximum

First, mathematical functionsABS (x) returns the absolute value of XBIN (x) returns the binary of X (Oct returns octal, HEX returns hex)CEILING (x) returns the smallest integer value greater than XEXP (x) return value E (base of natural logarithm) x

One, the string functionASCII (char) returns the ASCII code value of a characterBit_length (str) returns the bit length of a stringCONCAT (S1,S2...,SN) to concatenate s1,s2...,sn into a stringConcat_ws (SEP,S1,S2...,SN) joins the S1,S2...,SN into a

String functionsASCII (str)Returns the ASCII value of the first character of the string str (str is empty when the string returns 0)Mysql> Select ASCII (' 2 ');50Mysql> Select ASCII (2);50Mysql> Select ASCII (' dete ');100ORD (str)If the string str

Summary:Naive Bayesian classification is a Bayesian classifier, Bayesian classification algorithm is a statistical classification method, using probability statistical knowledge classification, the classification principle is to use the Bayesian

This method returns the natural logarithm of a number (the base is e). If the value of the number is negative, the return value is always nan.Grammar Math.log (x); The following are the details of the parameters: X: a number.

JavaScript syntax has strict capitalization, including keywords and variables ... Unlike HTML in JavaScript, the newline space does not work. For example, the IF condition and alert must be wrapped. Note: string in JS, you can use single quotes, or

javascript| Tutorial Object-based JavaScript language The JavaScript language is object-based (object-based) rather than object-oriented (object-oriented). It is said to be an object-based language, mainly because it does not provide many features

First, mathematical functionsABS (x)Returns the absolute value of XBIN (x) returns the binary of X (Oct returns octal, HEX returns hex)CEILING (x) returns the smallest integer value greater than x exp (x) return value E (base of natural logarithm) x

Reprinted from Http://www.jb51.net/article/40179.htmFirst, mathematical functionsABS (x) returns the absolute value of XBIN (x) returns the binary of X (Oct returns octal, HEX returns hex)CEILING (x) returns the smallest integer value greater than

First, mathematical functionsABS (x) returns the absolute value of XBIN (x) returns the binary of X (Oct returns octal, HEX returns hex)CEILING (x) returns the smallest integer value greater than XEXP (x) return value E (base of natural logarithm) x

First, mathematical functionsABS (x) returns the absolute value of XBIN (x) returns the binary of X (Oct returns octal, HEX returns hex)CEILING (x) returns the smallest integer value greater than XEXP (x) return value E (base of natural logarithm) x

First, mathematical functionsABS (x) returns the absolute value of XBIN (x) returns the binary of X (Oct returns octal, HEX returns hex)CEILING (x) returns the smallest integer value greater than XEXP (x) return value E (base of natural logarithm) x

ABS (x) returns the absolute value of XBIN (x) returns the binary of X (Oct returns octal, HEX returns hex)CEILING (x)Returns the smallest integer value greater than XEXP (x) return value E (base of natural logarithm) x Times SquareFloor (x) returns

First, mathematical functionsABS (x) returns the absolute value of XBIN (x) returns the binary of X (Oct returns octal, HEX returns hex)CEILING (x) returns the smallest integer value greater than XEXP (x) return value E (base of natural logarithm) x

first, mathematical functionsABS (x) returns the absolute value of XBIN (x) returns the binary of X (Oct returns octal, HEX returns hex)CEILING (x)Returns the smallest integer value greater than XEXP (x) return value E (base of natural logarithm) x

First, mathematical functionsABS (x) returns the absolute value of XBIN (x) returns the binary of X (Oct returns octal, HEX returns hex)CEILING (x) returns the smallest integer value greater than XEXP (x) return value E (base of natural logarithm) x

1. Discard the fractional part, preserving the whole number of partsparseint (5/2)2. Rounding up, with decimals on the integer part plus 1Math.ceil (5/2)3, rounded.Math.Round (5/2)4, rounding downMath.floor (5/2 )Second, the Math object Method 1.

Http://www.robotsky.com/ZhiN/MoS/2011-08-25/13142461416649.htmlImplementing AI Programming with Java Open Source project Joone http://www.robotsky.com Source: Network time: 2011-08-25 reviews 0(visit forum) Robotsky waiting for your submission >>Few