Checking first 2 charactors for a PO no.

Hello Friends,

I have a PO no wihich is starting with charactor "32" that is >> "32A2000023".

In my condition I want to check the first 2 charactors as "32" and if it is true I am executing my remaining code.

How do I check the 1st 2 charactors of a given PO.

Thanks,

Shreekant