How to convert characters to floating point type in javascript

Methods for converting javascript characters into floating point types: 1. Use the parseFloat() method, which can parse a string and return a floating point number, with the syntax "parseFloat (character variable)"; 2. Use " " Operator, syntax "(character variable)".

The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.

javascript character type conversion to floating point type

Method 1. Use parseFloat() method

## The #parseFloat() method is used to accept a string and convert it to a floating point number; it parses a string and returns a floating point number.

If the string does not contain a numeric value, or if the first character of the string is not a numeric value, NaN is returned, indicating that it is not a numeric value.

Example:

var n = "-33.565";
var floatValue = parseFloat(n);
console.log(floatValue);

Method 2: Using the " " operator

In javascript, you can use JavaScript's implicit type conversion function converts string values ​​into floats.

Implicit type conversion automatically performs type conversion based on the operator.

Example:

var n = "33.565";
document.write("转换前的值 为：" + n + "，类型为" + typeof n + "<br>");
var floatValue = +(n);
document.write("转换后的值 为：" + n + "，类型为" + typeof floatValue + "<br>");

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