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→INVESTIGATION 2: ADDITIONAL LOOPING STATEMENTS
# Save your editing session and exit the text editor (eg. with vi: press '''ESC''', then type ''':wx''' followed by '''ENTER''').<br><br>
# Set execute permissions for this shell script and run your shell script by issuing: <span style="color:blue;font-weight:bold;font-family:courier;">./for-6.bash</span><br><br>What do you notice? You should have noticed an error message.<br><br>In our lesson, we mentioned that values in user-defined variables are stored as '''TEXT'''.<br>Therefore, we need to convert a number stored as text into a '''binary number''' for calculations (in this case, advance the value by 1 for each loop).<br><br>
# Use a text editor like vi or nano to edit the text file called '''for-6.bash''' (eg. <span style="color:blue;font-weight:bold;font-family:courier;">vi for-6.bash</span>)<br>If you are using the nano text editor, refer to notes on text editing in a previous week in the course schedule.<br><br># Enter the following lines in your shell script:<br><span style="font-family:courier;font-weight:bold;">#!/bin/bash<br>clear<br>set 10 9 8 7 6 5 4 3 2 1<br>for x<br>do<br> echo $x<br>done<br>echo "blast-off!"</span><br><br># Save your editing session and exit the text editor (eg. with vi: press '''ESC''', then type ''':wx''' followed by '''ENTER''').<br><br># Add execute permissions for the owner of this script and run this script.<br>What do you notice?
:In the next investigation, you will learn to create and test-out the '''~/.bashrc''' start-up file to customize your Bash shell.