in reply to force user to only enter numbers

Can you show us what you have so far?

If you don't have anything yet, you might consider building a loop that reads from STDIN, and then checks the string for non-numeric characters with a regular expression. Don't forget to chomp! Once the string is in the format you want, leave the loop and process it however you want.

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Re^2: force user to only enter numbers
by adroit (Initiate) on Sep 02, 2011 at 16:12 UTC
    This is what I have tried 
    print "Enter a number\n";
$num = <STDIN>; 
if ($num < 0)
{
   print "please enter a number that is between 0 and 9 \n";
   $num = <STDIN>;
}
 
                                                           #Get input 
+from the keyboard
for($i=1;$i<=$num;$i++)                          #For loop to repeat a
+ set of statements until a condition is met
{
    print $i;             

}

print "Press any key to exit";
$key = <STDIN>;
#End of Program

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