求js（JavaScript）所有數(shù)學函數(shù)

function?Math(){};

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Math.prototype=new?Object();

/**

*?Property?E

*?@memberOf?Math

*?@since???Standard?ECMA-262?3rd.?Edition?

*?@since???Level?2?Document?Object?Model?Core?Definition.????

*/

Math.E=0;

/**

*?Property?LN10

*?@memberOf?Math

*?@since???Standard?ECMA-262?3rd.?Edition?

*?@since???Level?2?Document?Object?Model?Core?Definition.????

*/

Math.LN10=0;

/**

*?Property?LN2

*?@memberOf?Math

*?@since???Standard?ECMA-262?3rd.?Edition?

*?@since???Level?2?Document?Object?Model?Core?Definition.

*/

Math.LN2=0;

/**

*?Property?LOG2E

*?@memberOf?Math

*?@since???Standard?ECMA-262?3rd.?Edition?

*?@since???Level?2?Document?Object?Model?Core?Definition.????

*/

Math.LOG2E=0;

/**

*?Property?LOG10E

*?@memberOf?Math

*?@since???Standard?ECMA-262?3rd.?Edition?

*?@since???Level?2?Document?Object?Model?Core?Definition.?

*/

Math.LOG10E=0;

/**

*?Property?PI

*?@memberOf?Math

*?@since???Standard?ECMA-262?3rd.?Edition?

*?@since???Level?2?Document?Object?Model?Core?Definition.??

*/

Math.PI=0;

/**

*?Property?SQRT1_2

*?@memberOf?Math

*?@since???Standard?ECMA-262?3rd.?Edition?

*?@since???Level?2?Document?Object?Model?Core?Definition.????

*/

Math.SQRT1_2=0;

/**

*?Property?SQRT2

*?@memberOf?Math

*?@since???Standard?ECMA-262?3rd.?Edition?

*?@since???Level?2?Document?Object?Model?Core?Definition.?

*/

Math.SQRT2=0;

/**

*?function?abs(x)

*?@memberOf?Math

*?@param?{Number}?x

*?@type?Number

*?@returns?{Number}

*?@since???Standard?ECMA-262?3rd.?Edition?

*?@since???Level?2?Document?Object?Model?Core?Definition.?????

*/

Math.abs=function(x){return?0;};

/**

*?function?acos(x)

*?@memberOf?Math

*?@param?{Number}?x

*?@type?Number

*?@returns?{Number}

*?@since???Standard?ECMA-262?3rd.?Edition?

*?@since???Level?2?Document?Object?Model?Core?Definition.

*/

Math.acos=function(x){return?0;};

/**

*?function?asin(x)

*?@memberOf?Math

*?@param?{Number}?x

*?@type?Number

*?@returns?{Number}

*?@since???Standard?ECMA-262?3rd.?Edition?

*?@since???Level?2?Document?Object?Model?Core?Definition.??

*/

Math.asin=function(x){return?0;};

/**

*?function?atan(x)

*?@memberOf?Math

*?@param?{Number}?x

*?@type?Number

*?@returns?{Number}

*?@since???Standard?ECMA-262?3rd.?Edition?

*?@since???Level?2?Document?Object?Model?Core?Definition.

*/

Math.atan=function(x){return?0;};

/**

*?function?atan2(x,y)

*?@memberOf?Math

*?@param?{Number}?x

*?@param?{Number}?y

*?@type?Number

*?@returns?{Number}

*?@since???Standard?ECMA-262?3rd.?Edition?

*?@since???Level?2?Document?Object?Model?Core?Definition.??

*/

Math.atan2=function(x,y){return?0;};

/**

*?function?ceil(x)

*?@memberOf?Math

*?@param?{Number}?x

*?@type?Number

*?@returns?{Number}

*?@since???Standard?ECMA-262?3rd.?Edition?

*?@since???Level?2?Document?Object?Model?Core?Definition.????

*/

Math.ceil=function(x){return?0;};

/**

*?function?cos(x)

*?@memberOf?Math

*?@param?{Number}?x

*?@type?Number

*?@returns?{Number}

*?@since???Standard?ECMA-262?3rd.?Edition?

*?@since???Level?2?Document?Object?Model?Core?Definition.??

*/

Math.cos=function(x){return?0;};

/**

*?function?exp(x)

*?@memberOf?Math

*?@param?{Number}?x

*?@type?Number

*?@returns?{Number}

*?@since???Standard?ECMA-262?3rd.?Edition?

*?@since???Level?2?Document?Object?Model?Core?Definition.?

*/

Math.exp=function(x){return?0;};

/**

*?function?floor(x)

*?@memberOf?Math

*?@param?{Number}?x

*?@type?Number

*?@returns?{Number}

*?@since???Standard?ECMA-262?3rd.?Edition?

*?@since???Level?2?Document?Object?Model?Core?Definition.??

*/

Math.floor=function(x){return?0;};

/**

*?function?log(x)

*?@memberOf?Math

*?@param?{Number}?x

*?@type?Number

*?@returns?{Number}

*?@since???Standard?ECMA-262?3rd.?Edition?

*?@since???Level?2?Document?Object?Model?Core?Definition.????

*/

Math.log=function(x){return?0;};

/**

*?function?max(arg)

*?@memberOf?Math

*?@param?{Number}?args

*?@type?Number

*?@returns?{Number}

*?@since???Standard?ECMA-262?3rd.?Edition?

*?@since???Level?2?Document?Object?Model?Core?Definition.??

*/

Math.max=function(args){return?0;};

/**

*?function?min(arg)

*?@memberOf?Math

*?@param?{Number}?args

*?@type?Number

*?@returns?{Number}

*?@since???Standard?ECMA-262?3rd.?Edition?

*?@since???Level?2?Document?Object?Model?Core?Definition.????

*/

Math.min=function(args){return?0;};

/**

*?function?pow(x,y)

*?@memberOf?Math

*?@param?{Number}?x

*?@param?{Number}?y

*?@type?Number

*?@returns?{Number}

*?@since???Standard?ECMA-262?3rd.?Edition?

*?@since???Level?2?Document?Object?Model?Core?Definition.????

*/

Math.pow=function(x,y){return?0;};

/**

*?function?pow()

*?@memberOf?Math

*?@type?Number

*?@returns?{Number}

*?@since???Standard?ECMA-262?3rd.?Edition?

*?@since???Level?2?Document?Object?Model?Core?Definition.?????

*/

Math.random=function(){return?0;};

/**

*?function?round(x)

*?@memberOf?Math

*?@param?{Number}?x

*?@type?Number

*?@returns?{Number}

*?@since???Standard?ECMA-262?3rd.?Edition?

*?@since???Level?2?Document?Object?Model?Core?Definition.???

*/

Math.round=function(x){return?0;};

/**

*?function?sin(x)

*?@memberOf?Math

*?@param?{Number}?x

*?@type?Number

*?@returns?{Number}

*?@since???Standard?ECMA-262?3rd.?Edition?

*?@since???Level?2?Document?Object?Model?Core?Definition.????

*/

Math.sin=function(x){return?0;};

/**

*?function?sqrt(x)

*?@memberOf?Math

*?@param?{Number}?x

*?@type?Number

*?@returns?{Number}

*?@since???Standard?ECMA-262?3rd.?Edition?

*?@since???Level?2?Document?Object?Model?Core?Definition.?????

*/

Math.sqrt=function(x){return?0;};

/**

*?function?tan(x)

*?@memberOf?Math

*?@param?{Number}?x

*?@type?Number

*?@returns?{Number}

*?@since???Standard?ECMA-262?3rd.?Edition?

*?@since???Level?2?Document?Object?Model?Core?Definition.????

*/

Math.tan=function(x){return?0;};

javascript和數(shù)學有木有關系呢？

肯定是有一點關系的 但是涉及的知識點不大 簡單的函數(shù)寫多了就會理解 有些復雜的直接調用就可以了

JS中Math函數(shù)的常用方法

JS中Math函數(shù)的常用方法

Math是數(shù)學函數(shù)，但又屬于對象數(shù)據(jù)類型typeof Math= ‘object’

console.dir(Math)查看Math的所有函數(shù)方法。

1，Math.abs()獲取絕對值

Math.abs(-12) = 12

2，Math.ceil() and Math.floor()向上取整和向下取整

console.log(Math.ceil(12.03));//13

console.log(Math.ceil(12.92));//13

console.log(Math.floor(12.3));//12

console.log(Math.floor(12.9));//12

3，Math.round()四舍五入

注意：正數(shù)時，包含5是向上取整，負數(shù)時包含5是向下取整。

1、Math.round(-16.3) = -16

2、Math.round(-16.5) = -16

3、Math.round(-16.51) = -17

4，Math.random()取[0,1)的隨機小數(shù)

案例1：獲取[0,10]的隨機整數(shù)

console.log(parseInt(Math.random()*10));//未包含10

console.log(parseInt(Math.random()*10+1));//包含10

案例2：獲取[n,m]之間的隨機整數(shù)

Math.round(Math.random()*(m-n)+n)

5，Math.max() and Max.min()獲取一組數(shù)據(jù)中的最大值和最小值

console.log(Math.max(10,1,9,100,200,45,78));

console.log(Math.min(10,1,9,100,200,45,78));

6，Math.PI獲取圓周率π 的值

console.log(Math.PI);

7，Math.pow() and Math.sqrt()

Math.pow()獲取一個值的多少次冪

Math.sqrt()對數(shù)值開方

Math.pow(10，2) = 100;

Math.sqrt(100) = 10;