JavaScript ParseFloat() method_javascript skills

Definition and usage of parseFloat() method:

The parseFloat() method can parse a string and return a floating point number.

Note: If the first character in the string cannot be converted into a number, this method returns NaN. If the string contains multiple numbers, only the first number will be returned.

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Grammar structure:

Copy code The code is as follows:

parseFloat(string)

Parameter list:

参数	描述
string	必需。要被解析的字符串。

Example code:

Copy code The code is as follows:

console.log(parseFloat("123"));

Output result: 123.

Copy code The code is as follows:

console.log(parseFloat("123,321"));

Only the first number can be returned. Output result: 123.

Copy code The code is as follows:

console.log(parseFloat("N321"));

The first character cannot be converted to a number. Output result: NaN.

Copy code The code is as follows:

console.log(parseFloat("12 years old"));

Output result: 12.