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{{Admon/tip|Bash Shell Scripting Tips:|<br><ul><li>'''Data Input:'''<br><br>x<br><br></li><li>'''Mathematical Expressions:'''<br><br></li><li>'''Loops (iteration):'''<br><br>x<br><br>'''<u>Examples (try in a shell script)</u>'''<br><br>''set ops235 is fun''<br>''for x''<br>''do''<br> ''echo "argument is $x"''<br>''done''<br><br>''for x in $(ls)''<br>''do''<br> ''echo "Filename: $x"''<br>''done''<br><br>''read -p "enter a whole number: " num''<br>''until echo $num | grep -q "^[0-9][0-9]*$"''<br>''do''<br> '''read -p "Incorrect. Please enter WHOLE NUMBER: " num'''<br>''done''<br><br></li></ul>}}
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