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

echo 1 2 3 4 5|{
  read line; 
  for i in $line;
  do
    echo -n "$((i * i)) "; 
  done; 
  echo
}

The {} creates a grouping. You could instead create a script for that.