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Tutorial12: Shell Scripting - Part 2

120 bytes removed, 18 March
INVESTIGATION 2: ADDITIONAL LOOPING STATEMENTS
# Issue the following linux command:<br><span style="color:blue;font-weight:bold;font-family:courier;">echo $#</span><br><br>What do you notice? What does this value represent?<br><br>
# Issue the following linux command:<br><span style="color:blue;font-weight:bold;font-family:courier;">echo $*</span><br><br>What do you notice?<br><br>These positional parameters can be used with a for loop. To simplify things,<br>let's create another shell script that uses '''command substitution''' within a '''for''' loop.<br><br>
# Use a text editor like vi or nano to create the text file called '''for-3.bash''' (eg. <span style="font-weight:bold;font-family:courier;">vi for-3.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>&nbsp;&nbsp;&nbsp;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>
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