The only calculator I know is bc. I want to add 1 to a variable, and output to another variable. I got the nextnum variable from counting string in a file: nextnum=`grep -o stringtocount ...
Using echo "20+5" literally produces 20+5 What command can I use to get the actual sum, e.g. 25 in this case. Also, what's the easiest way to do it just using bash for floating point, e.g. echo ...