HPR4707: UNIX Curio #12 - expr

This show has been flagged as Clean by the host. This series is dedicated to exploring little-known—and occasionally useful—trinkets lurking in the dusty corners of UNIX-like operating systems. Arithmetic is something that one would normally expect computers to be able to do. With UNIX, one could of course always write a program to perform a calculation, but for people like me who are bad at…