topical media & game development
[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

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basic-shell-app-a-exercise-09-03.sh / sh



  # Using expr for math.
  # Calculates sales tax.
  
  echo -n "Please enter the amount of purchase: "
  read amount
  echo
  
  echo -n "Please enter the total sales tax: "
  read rate
  echo
  
  tax_base=`expr amount \* rate`
  
  tax=`expr tax_base / 100`
  
  total=`expr amount + tax`
  
  result=total
  
  echo "The total with sales tax is: $ result."
  When you run this script, you'll see:
   sh exercise_09_03
  Please enter the amount of purchase: 107
   
  Please enter the total sales tax: 7
   
  The total with sales tax is:  114.
  Compare this with the math2 script:
   sh math2
  Please enter the amount of purchase: 107
   
  Please enter the total sales tax: 7
   
  The total with sales tax is:  114.49.
[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

(C) Æliens 20/2/2008

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