alert("保留2位小数:" + toDecimal(3.14159267)); alert("强制保留2位小数:" + toDecimal2(3.14159267)); alert("保留2位小数:" + toDecimal(3.14559267)); alert("强制保留2位小数:" + toDecimal2(3.15159267)); alert("保留2位小数:" + fomatFloat(3.14559267, 2)); alert("保留1位小数:" + foma...
Number(value)——把给定的值转换成数字(可以是整数或浮点数); String(value)——把给定的值转换成字符串。 用这三个函数之一转换值,将创建一个新值,存放由原始值直接转换成的值。这会造成意想不到的后果。 当要转换的值是至少有一个字符的字符串、非0数字或对象(下一节将讨论这一点)时,Boolean()函数将...
let x = 100; // x is a number let y = "100"; // y is a string JavaScript will try to convert strings to numbers in all numeric operations:This will work:let x = "100"; let y = "10"; let z = x / y; Try it Yourself » This will also work:...
BigNumberDivision函数最终返回一个整数商和余数给到DecimalToBinary进行递归运算。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 functionDecimalToBinary(numberStr){letresult='';if(typeofnumberStr!=='string'||!/^(-?\d+)(\.\d+)?$/.test(numberStr)){throwTypeError('输入的参数必须为数字字符串...
T "T" appears literally in the string, to indicate the beginning of the time element. HH is the number of complete hours that have passed since midnight as two decimal digits from 00 to 24. : ":" (colon) appears literally twice in the string. ...
If the string begins with "0", the radix is 8 (octal). This feature is deprecated If the string begins with any other value, the radix is 10 (decimal) parseInt(string, radix) string Required. The string to be parsed radix Optional. A number (from 2 to 36) that represents the numera...
constnum=7;console.log(typeofnum);// numberconstnumString=num+"";console.log(typeofnumString);// string 转为Number parseInt()解析一个字符串为整数,你传递给它的字符串作为第一个参数,第二个参数作为基数。它指定使用哪个进制类型:hexadecimal (16), octal (8), or decimal (10)。
在JS 中没有真正意义上的整数,仅拥有一个number类型,不像 C 拥有int、float、double这几种类型,这在一定程度上降低了 JS 语言的上手成本,但是也带来了一些理解上的误差 JS number 中的整数就是没有小数的十进制数,所以第一个例子也就说得通了 // 整数小数判等相同 ...
functionhex2Int(hex =''){if(typeofhex !=='string'|| hex ==='') {returnNaN}consthexs = [...hex.toLowerCase()]letresInt =0for(leti =0; i < hexs.length; i++) {consthv = hexs[i]letnum = hv.charCodeAt() <58? +hv : ((code ...
null true = %x74.72.75.65 ; true object = begin-object [ member *( value-separator member ) ] end-object member = string name-separator value array = begin-array [ value *( value-separator value ) ] end-array number = [ minus ] int [ frac ] [ exp ] decimal-point = %x2E ; ....