BASH: how to perform arithmetic on numbers in a pipe

Question

I am getting a stream of numbers in a pipe, and would like to perform some operations before passing them on to the next section, but I\'m a little lost about how I would go

Answer 1

Or you can pipe to expression to bc:

echo "1 2 3 4 5" | (
  read line; 
  for i in $line;
  do
    echo $i^2 | bc; 
  done; 
  echo
)