Please help with this script. Post: 302421733

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Top Forums UNIX for Dummies Questions & Answers Please help with this script. Post 302421733 by methyl on Saturday 15th of May 2010 10:32:53 PM

05-15-2010

Registered User

As worded people would choose menu option 1/2/3 rather than type the name.

This script illustrates how to let the user enter the value again within a do-done loop and incorporates a simple way of exiting that loop with "break".
It is not a full solution because my data files were called 1.txt, 2,txt, 3.txt , and my menu options are not variables, and the my prompt message is different ... etc..

Code:

#!/bin/ksh
while true
do
     echo 
     echo "1) snickers"
     echo
     echo "2) twix"
     echo
     echo "3) bounty"
     echo

     echo "Please enter your chosen sweet: \c"
     read SWEET_CHOICE

     # Exit on null input
     if [ "${SWEET_CHOICE}""X" = "X" ]
     then
           break
     fi

     # Test for valid options
     if [ -f "${SWEET_CHOICE}.txt" ]
     then
         cat "${SWEET_CHOICE}.txt"
         break
     else
         echo "Invalid choice."
     fi
done

methyl

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LEARN ABOUT PHP

boolval

BOOLVAL(3)								 1								BOOLVAL(3)

boolval - Get the boolean value of a variable

SYNOPSIS

       boolean boolval (mixed  $var)

DESCRIPTION

	Returns the boolean value of $var.

PARAMETERS

	      o $var
		- The scalar value being converted to a boolean.

RETURN VALUES

	The boolean value of $var.

EXAMPLES

       Example #1

	      boolval(3) examples

	      <?php
	      echo '0:	      '.(boolval(0) ? 'true' : 'false')."
";
	      echo '42:       '.(boolval(42) ? 'true' : 'false')."
";
	      echo '0.0:      '.(boolval(0.0) ? 'true' : 'false')."
";
	      echo '4.2:      '.(boolval(4.2) ? 'true' : 'false')."
";
	      echo '"":       '.(boolval("") ? 'true' : 'false')."
";
	      echo '"string": '.(boolval("string") ? 'true' : 'false')."
";
	      echo '"0":      '.(boolval("0") ? 'true' : 'false')."
";
	      echo '"1":      '.(boolval("1") ? 'true' : 'false')."
";
	      echo '[1, 2]:   '.(boolval([1, 2]) ? 'true' : 'false')."
";
	      echo '[]:       '.(boolval([]) ? 'true' : 'false')."
";
	      echo 'stdClass: '.(boolval(new stdClass) ? 'true' : 'false')."
";
	      ?>

	      The above example will output:

	      0:	false
	      42:	true
	      0.0:	false
	      4.2:	true
	      "":	false
	      "string": true
	      "0":	false
	      "1":	true
	      [1, 2]:	true
	      []:	false
	      stdClass: true

SEE ALSO

       floatval(3), intval(3), strval(3), settype(3), is_bool(3), Type juggling.

PHP Documentation Group 														BOOLVAL(3)