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Groups > comp.lang.python > #73428

Re: how to check if a value is a floating point or not

From Sturla Molden <sturla.molden@gmail.com>
Subject Re: how to check if a value is a floating point or not
Date 2014-06-19 13:46 +0000
References <d5ca21d7-23e6-4240-83d8-262d0f877f7e@googlegroups.com>
Newsgroups comp.lang.python
Message-ID <mailman.11151.1403185631.18130.python-list@python.org> (permalink)

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<nicholascannon1@gmail.com> wrote:
> I am making a calculator and i need it to support floating point values
> but i am using the function isnumeric to check if the user has entered an
> int value. I need the same for floating point types so i could implement
> an or in the if statement that checks the values the user has entered and
> allow it to check and use floating points. If you need the source code i
> am happy to give it to you. Thank you for your help

It's better to ask forgiveness than ask permission...

You don't have to check anything. If the user enters something that cannot
be coverted to a float, the function float() will raise an exception:

try: 
    x = float(value)
except ValueError:
    # not a float
    pass


Sturla

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Thread

how to check if a value is a floating point or not nicholascannon1@gmail.com - 2014-06-18 22:53 -0700
  Re: how to check if a value is a floating point or not Gary Herron <gary.herron@islandtraining.com> - 2014-06-18 23:22 -0700
  Re: how to check if a value is a floating point or not Nicholas Cannon <nicholascannon1@gmail.com> - 2014-06-18 23:48 -0700
    Re: how to check if a value is a floating point or not Ben Finney <ben@benfinney.id.au> - 2014-06-19 17:19 +1000
    Re: how to check if a value is a floating point or not Ian Kelly <ian.g.kelly@gmail.com> - 2014-06-19 01:23 -0600
    Re: how to check if a value is a floating point or not Ian Kelly <ian.g.kelly@gmail.com> - 2014-06-19 01:37 -0600
  Re: how to check if a value is a floating point or not Sturla Molden <sturla.molden@gmail.com> - 2014-06-19 13:46 +0000
  Re: how to check if a value is a floating point or not Nicholas Cannon <nicholascannon1@gmail.com> - 2014-06-19 23:14 -0700
    Re: how to check if a value is a floating point or not Ian Kelly <ian.g.kelly@gmail.com> - 2014-06-20 00:22 -0600
    Re: how to check if a value is a floating point or not Sturla Molden <sturla.molden@gmail.com> - 2014-06-20 13:16 +0000
    Re: how to check if a value is a floating point or not Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-06-20 14:40 +0100
      Re: how to check if a value is a floating point or not Grant Edwards <invalid@invalid.invalid> - 2014-06-20 14:28 +0000
        Re: how to check if a value is a floating point or not alister <alister.nospam.ware@ntlworld.com> - 2014-06-20 15:15 +0000
        Re: how to check if a value is a floating point or not Ian Kelly <ian.g.kelly@gmail.com> - 2014-06-20 09:44 -0600

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