Vollstrecker is correct. Pi has an infinite number of digits. But so does the integer '1'. It is 1.000000 (0's repeating), or .9999999999999 (9's repeating). Pi can be halved, and that value can be expressed. It can not be expressed exactly as an irrational number, however it can be expressed as an infinite sum if you integrate a geometric series.

If someone wants the proof to that, I can write that out if they want. It requires knowledge of integral calculus.