#! /bin/bash


fun()
{
echo enter a number:
read n
for (( i=1; i<=n; i++ ))
do
for (( j=i; j>=1; j-- ))
do
echo -n "$i "
done
echo
done
control
}

control()
{
echo "Do you want to run again(yes/no)?"
read a
case $a in
yes )
fun ;;
no )
exit ;;
* )
echo "invaild input" ;;
esac
}

fun