Pi (π) is neither odd nor even.
Explanation
The concept of "odd" and "even" applies specifically to integers (whole numbers). Numbers are even if they are divisible by 2 with no remainder, and odd if they leave a remainder of 1 when divided by 2. Pi, however, is an irrational number, meaning it cannot be expressed as a simple fraction and its decimal representation goes on infinitely without repeating.
Since pi is not an integer, the terms "odd" or "even" are not applicable. Furthermore, because pi is an irrational number, it does not have a "last digit." Even if we could hypothetically determine even/oddness by a last digit (which isn't true for non-integers), we couldn't do so for pi.
In summary, the question of whether pi is odd or even is fundamentally based on a misunderstanding of the definitions of odd, even, and pi itself.
