On 11/02/17 09:47, boB Stepp wrote:
On Sat, Feb 11, 2017 at 1:00 AM, Amit Yaron <a...@phpandmore.net> wrote:
On 10/02/17 21:15, Peter Pearson wrote:
On Fri, 10 Feb 2017 13:59:45 +0200, Amit Yaron <a...@phpandmore.net>
wrote:
On 10/02/17 04:33, adam14711...@gmail.com wrote:
My computer programming professor challenged me to figure out a way
to manipulate my program to display one error message if the user
input is a zero or a negative number, and a separate error message if
the user input is a decimal number. My program starts out:
[snip]
What should happen if the user types "1.0"?
To be flexible about this possibility, you could accept the number
as a float, and then complain if int(num) != num.
Another option:
Use 'float' instead of 'int'. and check using the method 'is_integer' of
floating point numbers:
3.5.is_integer()
False
4.0.is_integer()
True
According to the OP's professor's challenge, the OP needs to recognize
an input of "4.0" as a float and "4" as an integer, and to respond
with an error message in the float case, or "decimal number" case as
the OP phrased it. Apparently only positive integers are acceptable
input; all other inputs should generate an appropriate error message
by input type.
Here's the output of the int function with a string argument:
>>> int("4.0")
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
You can use exception handling to detect numbers that do not match the
regular expression for integers, and comparisons to check if a number is
negative.
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