JavaScript DHTML/Javascript Objects/Math

Материал из Web эксперт
Версия от 07:23, 26 мая 2010; Admin (обсуждение | вклад) (1 версия)
(разн.) ← Предыдущая | Текущая версия (разн.) | Следующая → (разн.)
Перейти к: навигация, поиск

"abs()" Example

 
    
<html>
<body>
<button onclick="alert(Math.abs(-10));">Math.abs(-10)</button>
</body>
</html>



"acos()" Example

 
    
<html>
<body>
<button onclick="alert(Math.acos(1));">Math.acos(1)</button>
</body>
</html>



"asin()" Example

 
    
<html>
<body>
<button onclick="alert(Math.asin(1));">Math.asin(1)</button>
</body>
</html>



"atan2()" Example

 
    
<html>
<body>
<button onclick="alert(Math.atan2(1,1));">Math.atan2(1,1)</button>
</body>
</html>



"atan()" Example

 
    
<html>
<body>
<button onclick="alert(Math.atan(1));">Math.atan(1)</button>
</body>
</html>



"ceil()" Example

 
    
<html>
<body>
<button onclick="alert(Math.ceil(1.1));">Math.ceil(1.1): CEIL</button>
</body>
</html>



"cos()" Example

 
    
<html>
<body>
<button onclick="alert(Math.cos(1));">Math.cos(1)</button>
</body>
</html>



"E" Example

 
    
<html>
<body>
<button onclick="alert(Math.E);">Math.E</button>
</body>
</html>



"exp()" Example

 
    
<html>
<body>
<button onclick="alert(Math.exp(1));">Math.exp(1)</button>
</body>
</html>



"floor()" Example

 
    
<html>
<body>
<button onclick="alert(Math.floor(1.1));">Math.floor(1.1)</button>
</body>
</html>



"isNaN()" Example

 
    
<html>
<body>
<button onclick="alert(isNaN("12.34"));">isNaN("12.34") True</button>
<button onclick="alert(isNaN("Hello"));">isNaN("Hello") False</button>
</body>
</html>



"LN10" Example

 
    
<html>
<body>
<button onclick="alert(Math.LN2);">Math.LN2</button>
</body>
</html>



"LN2" Example

 
    
<html>
<body>
<button onclick="alert(Math.LN10);">Math.LN10</button>
</body>
</html>



"LOG10E" Example

 
    
<html>
<body>
<button onclick="alert(Math.LOG10E);">Math.Log10E</button>
</body>
</html>



"LOG2E" Example

 
    
<html>
<body>
<button onclick="alert(Math.LOG2E);">Math.Log2E</button>
</body>
</html>



"log()" Example

 
    
<html>
<body>
<button onclick="alert(Math.log(1));">Math.log(1)</button>
</body>
</html>



Math functions

    
Math                  Description Methods 
abs(x)                Returns the absolute value of x. 
acos(x)               Returns the arc cosine of x in radians. 
asin(x)               Returns the arc sine of x in radians. 
atan(x)               Returns the arc tangent of x in radians. 
atan2(y,x)            Returns the arc tangent of the quotient of its Arguments, that is, y/x. 
ceil(x)               Returns the smallest integer greater than or equal to x. 
cos(x)                Returns the cosine of x. 
exp(x)                Returns ex, where x is the Argument and e is Euler"s constant. 
floor(x)              Returns the largest integer less than or equal to x. 
log(x)                Returns the natural logarithm (base E) of x. 
max(x,y)              Returns the greater of the two numbers x and y. 
min(x,y)              Returns the lesser of the two numbers x and y. 
pow(x,y)              Returns xy, traditionally base to the exponent power, that is, baseexponent. 
random()              Returns a pseudo-random number between 0 and 1. 
round(x)              Returns the value of x rounded to the nearest integer with .50 as cutoff. 
sin(x)                Returns the sine of x. 
sqrt(x)               Returns the square root of x. 
tan(x)                Returns the tangent of x.



"max()" Example

 
    
<html>
<body>
<button onclick="alert(Math.max(1, 2));">Math.max(1, 2)</button>
</body>
</html>



"MAX_VALUE" Example

 
    
<html>
<body>
<button onclick="alert(Number.MAX_VALUE);">MAX_VALUE</button>
<button onclick="alert(Number.MIN_VALUE);">MIN_VALUE</button>
<button onclick="alert(Number.NEGATIVE_INFINITY);">NEGATIVE_INFINITY</button>
<button onclick="alert(Number.POSITIVE_INFINITY);">POSITIVE_INFINITY</button>
</body>
</html>



"min()" Example

 
    
<html>
<body>
<button onclick="alert(Math.min(1, 2));">Math.min(1, 2)</button>
</body>
</html>



"MIN_VALUE" Example

 
    
<html>
<body>
<button onclick="alert(Number.MAX_VALUE);">MAX_VALUE</button>
<button onclick="alert(Number.MIN_VALUE);">MIN_VALUE</button>
<button onclick="alert(Number.NEGATIVE_INFINITY);">NEGATIVE_INFINITY</button>
<button onclick="alert(Number.POSITIVE_INFINITY);">POSITIVE_INFINITY</button>
</body>
</html>



"NEGATIVE_INFINITY" Example

 
    
<html>
<body>
<button onclick="alert(Number.MAX_VALUE);">MAX_VALUE</button>
<button onclick="alert(Number.MIN_VALUE);">MIN_VALUE</button>
<button onclick="alert(Number.NEGATIVE_INFINITY);">NEGATIVE_INFINITY</button>
<button onclick="alert(Number.POSITIVE_INFINITY);">POSITIVE_INFINITY</button>
</body>
</html>



"parseFloat()" Example

 
    
<html>
<body>
<button onclick="alert(parseFloat("12.34"));">parseFloat("12.34")</button>
<button onclick="alert(parseFloat("Hello"));">parseFloat("Hello")</button>
</body>
</html>



"parseInt()" Example

 
    
<html>
<body>
<button onclick="alert(parseInt("12.34"));">parseInt("12.34")</button>
<button onclick="alert(parseInt("Hello"));">parseInt("Hello")</button>
</body>
</html>



"PI" Example

 
    
<html>
<body>
    <button onclick="alert(Math.PI);">Math.PI</button>
</body>
</html>



"POSITIVE_INFINITY" Example

 
    
<html>
<body>
<button onclick="alert(Number.MAX_VALUE);">MAX_VALUE</button>
<button onclick="alert(Number.MIN_VALUE);">MIN_VALUE</button>
<button onclick="alert(Number.NEGATIVE_INFINITY);">NEGATIVE_INFINITY</button>
<button onclick="alert(Number.POSITIVE_INFINITY);">POSITIVE_INFINITY</button>
</body>
</html>



"pow()" Example

 
    
<html>
<body>
<button onclick="alert(Math.pow(2,2));">Math.pow(2,2)</button>
</body>
</html>



"round()" Example

 
    
<html>
<body>
<button onclick="alert(Math.round(1.33));">Math.round(1.33)</button>
</body>
</html>



"sin()" Example

 
    
<html>
<body>
<button onclick="alert(Math.sin(1));">Math.sin(1)</button>
</body>
</html>



"SQRT1_2" Example

 
    
<html>
<body>
<button onclick="alert(Math.SQRT1_2);">Math.Sqrt1_2</button>
</body>
</html>



"SQRT2" Example

 
    
<html>
<body>
<button onclick="alert(Math.SQRT2);">Math.Sqrt2</button>
</body>
</html>



"sqrt()" Example

 
    
<html>
<body>
<button onclick="alert(Math.sqrt(2));">Math.sqrt(2)</button>
</body>
</html>



"tan()" Example

 
    
<html>
<body>
<button onclick="alert(Math.tan(1));">Math.tan(1) = ? </button>
</body>
</html>
Источник — «http://wbex.ru/index.php?title=JavaScript_DHTML/Javascript_Objects/Math&oldid=2719»