String reversal in Python

Question

I have taken an integer input and tried to reverse it in Python but in vain! I changed it into a string but still I am not able to. Is there any way to reverse it ? Is there any built-in function?

I am not able to convert the integer into a list so not able to apply the reverse function.

This is a duplicate: stackoverflow.com/questions/931092/reverse-a-string-in-python/… — Paolo Bergantino
– Paolo Bergantino, Commented Jun 14, 2009 at 1:42

jfs · Accepted Answer · 2009-06-13 16:31:31Z

30

You can use the slicing operator to reverse a string:

s = "hello, world"
s = s[::-1]
print s  # prints "dlrow ,olleh"

To convert an integer to a string, reverse it, and convert it back to an integer, you can do:

x = 314159
x = int(str(x)[::-1])
print x  # prints 951413

edited Jun 13, 2009 at 16:31

jfs

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answered Jun 13, 2009 at 16:07

Adam Rosenfield

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1 Comment

jfs Over a year ago

renamed str -> s to avoid confusion with builtin str

Macarse · Accepted Answer · 2009-06-13 16:07:53Z

4

Code:

>>> n = 1234
>>> print str(n)[::-1]
4321

answered Jun 13, 2009 at 16:07

Macarse

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Comments

Armandas · Accepted Answer · 2009-06-13 16:09:59Z

2

>>> int(''.join(reversed(str(12345))))
54321

answered Jun 13, 2009 at 16:09

Armandas

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1 Comment

Macarse Over a year ago

Note: Not as pythonic as the slicing operator solution.

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