Help arranging text

UNIX for Beginners Q & A
1

By using this code how can we get the stars in inverted positions?

str="*"

for i in 1 2 3 4 5
do
   echo "$str"
   str="$str *"
done

The output should be like this

* * * * *
   * * * *
      * * *
         * *
            *
2

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1 Like
3

It would be beneficial to mention OS and shell version that you use so the solution proposals can be based on facts.

4

Assuming bash or ksh to be your shell, try

str="* * * * *"
for i in 1 2 3 4 5
  do   echo "$str"
       str="${str/\*/ }"
  done
* * * * *
  * * * *
    * * *
      * *
        *
1 Like
5

Drawing in text is not quite straight forward without the aid of terminal escape codes but here you go:-

#!/bin/bash
str="* * * * *"
spc="   "
echo "$str"
for i in 2 4 6 8
do
	newstr="$spc${str:$(($i-2)):$((9-$i))}"
	spc=$spc"   "
	echo "$newstr"
done

Results, OSX 10.12.0, default bash terminal.

Last login: Mon Oct 31 14:40:10 on ttys000
AMIGA:barrywalker~> cd Desktop/Code/Shell
AMIGA:barrywalker~/Desktop/Code/Shell> chmod 755 draw.sh
AMIGA:barrywalker~/Desktop/Code/Shell> ./draw.sh
* * * * *
   * * * *
      * * *
         * *
            *
AMIGA:barrywalker~/Desktop/Code/Shell>
6

Thread has been renamed to 'help arranging text', please give your threads more useful titles than 'help' in the future.