Ubuntu Unleashed 2019 Edition: Covering 18.04, 18.10, 19.04

esac

You can specify a number of discrete values—such as str1, str2, and so
on—for each condition, or you can specify a value with a wildcard. The last
condition should be an asterisk (*) and is executed if none of the other
conditions are met. For each of the specified conditions, all the associated
statements until the double semicolon (;;) are executed.

You can write a script that echoes the name of the month if you provide the
month number as a parameter. If you provide a number that isn’t between 1
and 12, you get an error message. The script is as follows:

Click here to view code image
#!/bin/sh

case    $1  in

            01  |   1)  echo    "Month  is  January";;

            02  |   2)  echo    "Month  is  February";;

            03  |   3)  echo    "Month  is  March";;

            04  |   4)  echo    "Month  is  April";;

            05  |   5)  echo    "Month  is  May";;

            06  |   6)  echo    "Month  is  June";;

            07  |   7)  echo    "Month  is  July";;

            08  |   8)  echo    "Month  is  August";;

            09  |   9)  echo    "Month  is  September";;

            10) echo    "Month  is  October";;

            11) echo    "Month  is  November";;

            12) echo    "Month  is  December";;

            *)  echo    "Invalid    parameter";;

esac

You need to end the statements under each condition with a double semicolon
(;;). If you do not, the statements under the next condition are also executed.

The format for a case statement for tcsh is as follows:

Click here to view code image
switch (str)
case str1|str2:
Statements
breaksw
case str3|str4:
Statements
breaksw
default:
Statements
breaksw
endsw