On Tue, May 31, 2011 at 10:36 PM, Rachel-Mikel ArceJaeger
<[email protected]> wrote:
> Isn't one of the unsolved millenium prize problems one that includes the
> ability to find all of the prime numbers? I'm not sure if your program is
> possible if the input number is large.
> But to check if a number x is an int, just do this:
> x == int(x)
As a note to the OP, this won't work without exception catching.
>>> 2 == int(2)
True
>>> 2 == int("fish")
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ValueError: invalid literal for int() with base 10: 'fish'
Of course, you can use the built-in string method isdigit() for this,
for example -
>>> "fish".isdigit()
False
>>> "2".isdigit()
True
>>> "2.0".isdigit()
False
>>> "2000".isdigit()
True
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