JavaScript Number() Function

　JavaScript Global Properties/Function

The function of the Number() is to convert the given object parameter to a number.

Returns NaN if the value cannot be converted to a number.

If the parameter is a Date object, the Number() function returns the milliseconds since UTC 1970 years1Month1Milliseconds since the start of the day at midnight.

Syntax:

Number(object)

Number(true);　//　1
Number(false);//　0
Number('100');//　100
Number('2　+　6);　　//　NaN
Number(new Date());

Browser Compatibility

All browsers fully support the Number() function:

Parameter Value

Technical Details

　JavaScript Global Properties/Function