2 ms·

Why?!

• detaro 6y ago
  Because its originally error codes. 0 is "all went well", != 0 is an error code telling you why it failed. I'd guess which then got things added like "programA && programB" as "A went well, so do B and check if B goes well", which kinda gives the logic value true to 0.
  • BlueTemplar 6y ago
    Right, should have remembered that from that time I got into C...
    • detaro 6y ago
      Although C does map 0 to false, so it really is a shell-ism, despite the return code pattern being used in C and other places.