isSafeInteger() 方法用来判断传入的参数值是否是一个"安全整数"(safe integer),如果是安全整数返回 true,否则返回 false。一个安全整数是一个符合下面条件的整数:可以准确地表示为一个 IEEE-754 双精度数字。 其IEEE-754 表示不能是舍入任何其他整数以适应 IEEE-754 表示的结果。比如,2^53 - 1 是一个安全...
在isSafeInteger()方法中传递一个数字(带小数)作为参数。 document.write("Output:"+Number.isSafeInteger(0.5)); 输出: Output:false 在isSafeInteger()方法中传递一个方程式(等于无穷大值)作为参数。 document.write("Output:"+Number.isSafeInteger(0/0)); 输出: Output:false 代码说明: JavaScript使用IEEE ...
The MAX_SAFE_INTEGER constant has a value of 9007199254740991 (9,007,199,254,740,991 or ~9 quadrillion). The reasoning behind that number is that JavaScript uses double-precision floating-point format numbers as specified in IEEE 754 and can only safely represent numbers between -(253 - 1)...
This JavaScript tutorial explains how to use the Number property called MIN_SAFE_INTEGER with syntax and examples. In JavaScript, MIN_SAFE_INTEGER is a static property of the Number object that is used to return the minimum safe integer value.
HTMLJavascriptProgramming Scripts The isSafeInteger() function of the Number object accepts a number and determines if it is safe integer. If the given number is a safe integer it returns true else, it returns false. Syntax Its Syntax is as follows Number.isSafeInteger(90071991); Advertisement...
The Number.isSafeInteger() method returns trueif a number is a safe integer.Otherwise it returns false.What is a JavaScript Safe Integer?A safe integer is an integer that can be exactly represented as an IEEE-754 double precision number: all integers from (253 - 1) to -(253 - 1)....
对应的还有Number.MIN_SAFE_INTEGER。以上两个常量是ES6引入的，在此之前只能作为事实标准。2^53 是 js...
Number.isSafeInteger(3);// trueNumber.isSafeInteger(2**53);// falseNumber.isSafeInteger(2**53-1);// trueNumber.isSafeInteger(NaN);// falseNumber.isSafeInteger(Infinity);// falseNumber.isSafeInteger("3");// falseNumber.isSafeInteger(3.1);// falseNumber.isSafeInteger(3.0);// true ...
|Number.MIN_SAFE_INTEGER属性的属性特性 | |:---| | Writable | no | | Enumerable | no | | Configurable | no | 描述 MIN_SAFE_INTEGER的值是-9007199254740991. 形成这个数字的原因是 JavaScript 在IEEE 754中使用double-precision floating-point format numbers作为规定。在这个规定中能安全的表示数字的范...
The simple definition of the safe integer in JavaScript is all numbers we can represent under the IEEE-754 double-precision number. It is the set of all numbers that lie between the -(2^53) to (2^53) exclusive, and we can represent it in the standard way....