3 ms·

Being able to do arithmetic right in the shell is handy.

• icebraining 9y ago
  $ echo $((1 + 2 * 3 - 4)) 3
  • vbernat 9y ago
    With zsh, you can even save a few keystrokes. function c() { echo $(($@)) } alias c='noglob c'
    • jplatte 9y ago
      zsh can handle floating point arithmetic too, while bash can't.
• tyingq 9y ago
  They way they chose to do it though seems to create some ambiguity. Like, what does this do? I can think of 3 distinctly different things it could do. $ echo test 1 + 2>err Or what if there are files with these names? $ cp /bin/grep 42 $ 42 + 1