parseFloat() 函数可解析一个字符串,并返回一个浮点数。该函数指定字符串中的首个字符是否是数字。如果是,则对字符串进行解析,直到到达数字的末端为止,然后以数字返回该数字,而不是作为字符串。语法parseFloat(string)参数描述 string 必需。要被解析的字符串。
JavaScript 类型转换(String、toString、toFixed、toPrecision、toExponential、Number、parseFloat、parseInt、Boolean) 1、转换字符(String、toString、toFixed、toPrecision、toExponential) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 varii=1234.456; varbb=false; //数字转换字符 docum...
const string = parseFloat("100 MB") console.log(string) // 100 除了parseFloat()之外,是否还有其他方法可以将字符串转换为数字,但如果我想将其转换为原始字符串,则可以保留字符串的MB部分?发布于 4 月前 ✅ 最佳回答: const string = "100 MB"; let toArr = string.split(' '); // do your ...
We pass the string value of “10 20 30” in the parseFloat method. But the value returned by the parseFloat method is only 10. This is because the first number in the string we pass is 10. After 10, there is whitespace. The parseFloat method does not count anything after whitespaces i...
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The string to be parsed and converted to a number. Returns The parsed number, orNaNifsdoes not begin with a valid number. In JavaScript 1.0,parseFloat( )returns 0 instead ofNaNwhenscannot be parsed as a number. Description parseFloat( )parses and returns the first number that occurs ins....
parseInt(string, radix) 解析一个字符串并返回指定基数的十进制整数,radix 是 2-36 之间的整数,表示被解析字符串的基数。
letname='Charlse';letplace='India';letisPrime=bit=>{return(bit==='P'?'Prime':'Nom-Prime');}// string concatenation using + operatorletmessageConcat='Mr. '+name+' is from '+place+'. He is a'+' '+isPrime('P')+' member.' ...
parseFloat() Return Value Returns a floating-point number parsed from the given string. Returns NaN when the first non-whitespace character can't be converted to a number. Example: Using parseFloat() console.log(parseFloat(" 10 ")); // 10 console.log(parseFloat(" 3.14seconds")); // 3.14...
parseFloat()Parses a string and returns a floating point number parseInt()Parses a string and returns an integer The Unary + Operator Theunary + operatorcan be used to convert a variable to a number: Example lety ="5";// y is a string ...