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Parses the argument as a float number and returns it. The argument is a string:
将参数解析为浮点数并将其返回。 参数是一个字符串：
Number.parseFloat('10') //10Number.parseFloat('10.00') //10Number.parseFloat('237,21') //237Number.parseFloat('237.21') //237.21Number.parseFloat('12 34 56') //12Number.parseFloat(' 36 ') //36Number.parseFloat('36 is my age') //36Number.parseFloat('-10') //-10Number.parseFloat('-10.2') //-10.2 As you can see Number.parseFloat() is pretty flexible. It can also convert strings with words, extracting the first number, but the string must start with a number:
如您所见， Number.parseFloat()非常灵活。 它还可以用单词转换字符串，提取第一个数字，但是字符串必须以数字开头：
Number.parseFloat('I am Flavio and I am 36') //NaN It only handles radix 10 numbers.
它只处理基数10的数字。
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