Write a script called checkLetter.sh Review Greeting.sh for an example. Use a read statement and ask user to "Enter A, B, or C: "

If user types A, echo "You entered A"
If user types B, echo " You entered B"
If user types C, echo " You entered C"
Use the case structure to test the user’s string.
If user types any letter from lower case ‘a through z’ or upper case ‘D through Z’, echo "You did not enter A, B, or C".

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mavis.zulauf · Accepted Answer

Answer:The code is given as below: The input and output is as given for one case.Explanation:echo -e "Enter A, B or C : \c" #Printing the line on the screenread -rN 1 test #read the character in the variable testechocase $test in #Setting up the case structure for variable test[[:lower:]] ) #checking all lower case lettersecho You did not enter A, B or C;;[D-Z] ) #checking upper case letters from D to Zecho You did not enter A, B or C;;A ) #Condition to check Aecho You entered A;;B ) #Condition to check Becho You entered B;;C ) #Condition to check Cecho You entered C;;esac #Exiting the case structure

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