Name
Number
Constructor
new Number(value
) Number(value
)
With the new
operator, the
Number( )
constructor converts its
argument to a numeric value and returns a new Number object wrapped
around that value. Without new
,
Number( )
is a conversion function
that converts its argument to a number and returns that value.
Constants
These constants are properties of Number
itself, not of individual Number
objects.
Number.MAX_VALUE
The largest representable number. Approximately 1.79E+308.
Number.MIN_VALUE
The smallest representable positive number. Approximately 5E-324.
Number.NaN
Not-a-number value. Same as the global
NaN
.Number.NEGATIVE_INFINITY
Negative infinite value.
Number.POSITIVE_INFINITY
Infinite value. Same as global
Infinity
.
Methods
toExponential(
digits
)
Returns a string representation of the number, in exponential notation, with one digit before the decimal place and
digits
digits after the decimal place. The fractional part of the number is rounded, or padded with zeros so that it has the specified length.digits
must be between 0 and 20, and if omitted, as many digits as necessary are used. JS 1.5; JScript 5.5; ECMA v3.toFixed(
digits
)
Returns a string representation of the number that does not use exponential notation, and has exactly
digits
digits after the decimal place.digits
must be between 0 and 20. The number is rounded or padded with zeros if necessary. JS 1.5; JScript 5.5; ECMA v3.toLocaleString( )
Returns an implementation-dependent string representation of the number, formatted according ...
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