Can someone please help....

08-25-2013

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Need help with "case statement" and :while loop"..

..with how to use basic arithmetic options in a case state statement and then loop them with say, a "while" loop? Please be gentle as I am definitely a newbie.

Example: I need a very simple option "case statement" for these all together.

Code:

sum=$((num1 + num2))
diff=$((num1 - num2))
prod=$((num1 *\ num2))
quot=$((num1 / num2))

and then "while" looped.

thanks a bunch,

joe.

Last edited by jefferj54; 08-25-2013 at 01:12 PM.. Reason: Please use code tags

jefferj54

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08-25-2013

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Hi, welcome to these forums. Could you elaborate some more on what your problem is and what you are trying to accomplish?

Perhaps something like this may give you some idea:

Code:

echo 'enter "num1" operation "num2" (space separated)'
while read num1 operation num2
do
  case $operation in
    (+)  result=$((num1 + num2)) ;; 
    (-)  result=$((num1 - num2)) ;; 
    (\*) result=$((num1 * num2)) ;; 
    (/)  result=$((num1 / num2)) ;; 
    (*)  result="Invalid input"
  esac
  printf "%s\n" "$result"
done

Scrutinizer

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08-26-2013