JavaScript parsefloat () method _javascript Tips

Definition and usage of the parsefloat () method:

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

Note: This method returns Nan if the first character in the string cannot be converted to a number. If a string contains more than one number, only the first number is returned.

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Syntax structure:

Copy Code code as follows:

Parsefloat (String)

Parameter list:

Parameters	Describe
String	Necessary. The string to be parsed.

Instance code:

Copy Code code as follows:

Console.log (parsefloat ("123"));

Output result: 123.

Copy Code code as follows:

Console.log (parsefloat ("123,321"));

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

Copy Code code as follows:

Console.log (parsefloat ("N321"));

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

Copy Code code as follows:

Console.log (Parsefloat ("12 Years old"));

Output Result: 12.