JavaScript(JS) Number.MAX_VALUE
JavaScript(JS) Number.MIN_VALUE
JavaScript(JS) Number.NaN
JavaScript(JS) Number.NEGATIVE_INFINITY
JavaScript(JS) Number.POSITIVE_INFINITY
JavaScript(JS) number.constructor
JavaScript(JS) object.prototype
JavaScript(JS) number.toExponential()
JavaScript(JS) number.toFixed()
JavaScript(JS) number.toLocaleString()
JavaScript(JS) number.toPrecision()
JavaScript(JS) number.toString()
JavaScript(JS) number.valueOf()
JavaScript(JS) boolean.constructor()
JavaScript(JS) boolean.toSource()
JavaScript(JS) boolean.toString()
JavaScript(JS) boolean.valueOf()
JavaScript(JS) string.constructor
JavaScript(JS) string.length
JavaScript(JS) string.charAt(index)
JavaScript(JS) string.charCodeAt(index)
JavaScript(JS) string.concat(string2, string3[, ..., stringN])
JavaScript(JS) string.indexOf(searchValue[, fromIndex])
JavaScript(JS) string.lastIndexOf(searchValue[, fromIndex])
JavaScript(JS) string.localeCompare( param )
JavaScript(JS) string.match( param )
JavaScript(JS) string.replace(regexp/substr, newSubStr/function[, flags])
JavaScript(JS) string.search(regexp)
JavaScript(JS) string.slice( beginslice [, endSlice] )
JavaScript(JS) string.split([separator][, limit])
JavaScript(JS) string.substr(start[, length])
JavaScript(JS) string.substring(indexA, [indexB])
JavaScript(JS) string.toLocaleLowerCase( )
JavaScript(JS) string.toLocaleUpperCase( )
JavaScript(JS) string.toLowerCase( )
JavaScript(JS) string.toString( )
JavaScript(JS) string.toUpperCase( )
JavaScript(JS) string.valueOf( )
JavaScript(JS) string.anchor(anchorname )
JavaScript(JS) string.big( )
JavaScript(JS) string.blink( )
JavaScript(JS) string.bold( )
JavaScript(JS) string.fixed( )
JavaScript(JS) string.fontcolor( color )
JavaScript(JS) string.fontsize( size )
JavaScript(JS) string.italics( )
JavaScript(JS) string.link( hrefname )
JavaScript(JS) string.strike( )
JavaScript(JS) string.sub( )
JavaScript(JS) string.sup( )
JavaScript(JS) string.small( )
JavaScript(JS) array.constructor
JavaScript(JS) array.length
JavaScript(JS) array.concat(value1, value2, ..., valueN)
JavaScript(JS) array.every(callback[, thisObject])
JavaScript(JS) array.filter(callback[, thisObject])
JavaScript(JS) array.forEach(callback[, thisObject])
JavaScript(JS) array.indexOf(searchElement[, fromIndex])
JavaScript(JS) array.join(separator)
JavaScript(JS) array.lastIndexOf(searchElement[, fromIndex])
JavaScript(JS) array.map(callback[, thisObject])
JavaScript(JS) array.pop()
JavaScript(JS) array.push(element1, ..., elementN)
JavaScript(JS) array.reduce(callback[, initialValue])
JavaScript(JS) array.reduceRight(callback[, initialValue])
JavaScript(JS) array.reverse()
JavaScript(JS) array.shift()
JavaScript(JS) array.slice( begin [,end] )
JavaScript(JS) array.some(callback[, thisObject])
JavaScript(JS) array.toSource()
JavaScript(JS) array.sort( compareFunction )
JavaScript(JS) array.splice(index, howMany, [element1][, ..., elementN])
JavaScript(JS) array.toString()
JavaScript(JS) array.unshift( element1, ..., elementN )
JavaScript(JS) Math.E
JavaScript(JS) Math.LN2
JavaScript(JS) Math.LN10
JavaScript(JS) Math.LOG2E
JavaScript(JS) Math.LOG10E
JavaScript(JS) Math.PI
JavaScript(JS) Math.SQRT1_2
JavaScript(JS) Math.SQRT2
JavaScript(JS) Math.abs( x )
JavaScript(JS) Math.acos( x )
JavaScript(JS) Math.asin( x )
JavaScript(JS) Math.atan( x )
JavaScript(JS) Math.atan2( x, y )
JavaScript(JS) Math.ceil( x )
JavaScript(JS) Math.cos( x )
JavaScript(JS) Math.exp( x )
JavaScript(JS) Math.floor( x )
JavaScript(JS) Math.log( x )
JavaScript(JS) Math.max(value1, value2, ... valueN )
JavaScript(JS) Math.min(value1, value2, ... valueN )
JavaScript(JS) Math.pow(base, exponent )
JavaScript(JS) Math.random()
JavaScript(JS) Math.round( x )
JavaScript(JS) Math.sin( x )
JavaScript(JS) Math.sqrt( x )
JavaScript(JS) Math.tan( x )

JavaScript(JS) Math.LOG2E

手机查看 2021-08-29

Math对象为数学常量和函数提供属性和方法。与其他全局对象不同，Math不是构造函数。Math的所有属性和方法都是静态的，可以通过将Math作为对象来调用，而无需创建它。本文主要介绍JavaScript(JS) Math.LOG2E 属性。

1、描述

这将返回以2为底的E的对数，它大约等于1.442。

2、语法

Math.LOG2E

3、使用示例

<html>   
   <head>
      <title>JavaScript Math LOG2E Property</title>
   </head>
   
   <body>      
      <script type = "text/javascript">
         var property_value = Math.LOG2E;
         document.write("Property Value = " + property_value); 
      </script>      
   </body>
</html>