13,420
edits
Changes
→INVESTIGATION 3: exit AND break STATEMENTS
# '''Add execute permissions''' for this Bash shell script.<br><br>
# Issue the following command (without arguments):<br><span style="color:blue;font-weight:bold;font-family:courier;">./break-1.bash</span><br><br>When prompted, enter several '''invalid''' and '''valid''' integers that are '''NOT 5''', and then finally enter the value '''5'''.<br><br>What happens?<br><br>Let's use the '''break''' statement with the '''for''' loop.<br><br>
# Use a text editor like vi or nano to create the text file called '''break-2.bash''' (eg. <span style="color:blue;font-weight:bold;font-family:courier;">vi break-12.bash</span>)<br><br># Enter the following lines in the '''break-2.bash''' shell script:<br><span style="font-family:courier;font-weight:bold;">#!/bin/bash<br><br>read -p "Enter an integer: " number<br>while ! echo $mark | egrep "^[0-9]{1,}$" > /dev/null 2> /dev/nullfor x<br>do<br> read -p "Try again. Enter a valid integer: " number<br> if [ $number -eq 5 x = "uli101" ]<br> then<br> break<br> fi<br> echo "Argument is: $x"<br>done</span><br><br>
# Save your editing session and exit the text editor (eg. with vi: press '''ESC''', then type ''':x''' followed by '''ENTER''').<br><br>
# '''Add execute permissions''' for this Bash shell script.<br><br>
