Shell pocket calculator (pure sh)

calc(){ printf "%.8g\n" $(printf "%s\n" "$*" | bc -l); }
This shell calculator uses POSIX features only and is therefore portable. By default the number of significant figures is limited to 8 with trailing zeros stripped, resembling the display of a basic pocket calculator. You might want to increase this to 12 to emulate a scientific calculator.
Sample Output
$ calc "x = 2 + 2; ++x"
$ calc "10 / 16"
$ calc "sqrt(2)"
$ calc "(1.2 + 3.4) ^ 56"

By: lordtoran
2019-02-06 23:32:35

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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