#!/bin/bash
 
if [ -n "$1" ];  then
  y=1
while [ $y -le $1 ]; do
  x=$[y * y]
  echo "Potega: $x"
  y=$[y + 1]
done
 else
  echo -e "Nie podales parametru!"
 fi

#!/bin/bash
 
if [ -n "$1" ]; then
  for i in `seq "$1"`; do
        echo "$i do potegi 2 = $[i*i]";
  done
else
        echo "Nie podales parametru!"
fi