On Mon, 19 Dec 2022, David Chmelik wrote:
If the shell arithmetic is not sufficient, then I'd recommend bc(1).
Thanks! I was looking for that. I don't know whether bc or calc is
better...
But, do try out the built-in shell arithmetic, too. (Eg, under
"Arithmetic Expansion" and "ARITHMETIC EVALUATION" in the bash manpage.)
Basically anything in double-parens (( )) gets treated like integer math
in C (you can even skip the $ prefix for variables), and $(( )) is the
same but you can use the result as a string in your command line.
It doesn't handle floating-point (while bc(1) does), but if all you want
is expr(1) math without needing spaces, the shell does just fine.
Carl
