Creating an outline of triangle shape on linux terminal, using any characeter

This post is in response to the comment #2 in the post Creating a triangle of characters on terminal

The following script will create a blank triangle of characters on the linux terminal, but unlike the script in "" the triangle will be empty, i.e. only the outline has the characters chosen by the user and inside is left blank.

#!/bin/bash cols=`tput cols` start=$((cols/2)) echo "How many rows do you want" read rows echo "What character do you want to use" read char tput clear for((i=0;i<rows;i++)) do cols=$((start-i)) tput cup $i $cols for((j=0;j<=i;j++)) do if [ $i -eq $((rows-1)) ] then printf "$char " elif [ $j -eq 0 ] then printf "$char " else if [ $j -eq $i ] then printf "$char " else printf " " fi fi done done echo""

Save the script as blank_triangle.sh and give it execute permissions

chmod 777 blank_trinale.sh

Now execute it

./blank_triangle.sh How many rows do you want 10 What character do you want to use #

Thus we can see that the script is able to draw the blank triangle of any character user wants and any number of rows (limited by the number of rows in one terminal screen )