<caption><image_42>The image is a screenshot of a computer screen with a blue background. On the screen, there is a text that reads "pattern" and "what to look for in the phone list". The text is written in white and is in a simple, sans-serif font. Below the text, there are two icons - a phone and a calculator. The phone icon is on the left side of the screen and the calculator icon on the right side.</caption><caption><image_43>The image is a screenshot of a computer screen with a dark blue background. In the center of the screen, there is a text written in white text that reads "echo "Too many patterns - only one allowed". The text is written in a bold, sans-serif font and is centered on the screen. The text appears to be a code or code snippet.</caption> matter how many arguments are on the command line if there's more than one than run this command because the star always matches any pattern it should always be the last listing in a case statement in this case it's the last listing as well they could have chosen to use the word end case or end or stop or last line however the people that wrote the shell decided to use the word case spelled backwards to note the end of a case statement that's the purpose of the word that is sometimes pronounced EES AK at the bottom of this case listing one more thing to note about syntax each conditional command line terminates with a double semicolon the main reason for this is to allow you to have several commands identified by a single option to actually create the case statement that we want to put into pH fine we have to determine what we're gonna do if there are no arguments or if there's more than one argument on the command line if there are no arguments I suggest that we print out a message identifying how to use pH find I'm gonna recommend that we run these to echo statements the first one identifies how to enter the command the second line identifies what the pattern means and how it should be entered note the double semicolon at the end of the second echo statement but not at the end of the first one that's because the second echo statement is the end of this conditional section if more than one argument has been entered I suggest that we tell the user that too many patterns have been entered only one
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