JavaScript Global method: parseInt()
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The JavaScript
Global
parseInt() method parses a
string returns an integer where practical. If the first available non-space
character of x is not numerical then the method returns NaN. Only the first of multiple
numbers will be returned.
It
has the following syntax with the following parameters:
parseInt(x, radix)
|
Parameter
|
Required / Optional
|
Description
|
|
x
|
Required
|
String corresponding to
the input number
|
|
radix
|
Optional
|
An integer between 2
and 36 specifying the radix, i.e. number base, used in forming the integer
from the strong. See below if omitted
|
Users are recommended to
include a radix as the results can otherwise vary by browser. Usually, if the
radix is omitted and x begins with “0x” (maybe “Ox”) then the radix
(number base) is taken to be 16. If it begins with “0” (maybe “O”) then the
radix is base 8 (this option is depreciated), otherwise usually the radix is
defaulted to base 10 (i.e. decimal). The method finds the first character in x
after leading spaces, works out if this is one that can appear in a number and
then continues parsing the string until it reaches the end of any part that is
interpretable as a number, returning that number as a number value, not a
string.
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