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I remember being really intrigued when I ran into Fortran programs that used negative array indices. It's pretty handy in a lot of situations.

• Cyph0n 9y ago
  It's commonly used in Python too: >> last_elem = arr[-1] >> rev_arr = arr[::-1] # Reverse array
  • 3JPLW 9y ago
    That is something completely different. Where Fortran allows negative indexing is when you initialize your array such the the indices are offset in the same manner as described in the linked article.
    • Cyph0n 9y ago
      I see. I'm obviously not familiar with Fortran :P