I am practicing few Regex exercises, one was this, Use regular expressions (RE) to check that the data you get when asking for numbers, are actually numbers. Also check that the operation is valid. These should all be considered as numbers: "4" "-7" "0.656" "-67.35555" These are not numbers: "5." "56F" ".32" "-.04" I have come up with this code, although I know it is not the best way. Can you suggest a better way to search in a single go rather than using OR? 
print ("Enter the number to check if it is actually a number:");
$input = <STDIN>;
while ($input ne "")
{
chop ($input);
if ($input =~ /^\d+$/ | $input =~ /^\d+.\d+$/ | $input =~ /^-\d+$/ | $
+input =~ /^-\d+.\d+$/)
{
print ("Yes, it is a number\n");
}
else 
{
print ("No, it is not a number\n");
}
print ("Give another input:");
$input = <STDIN>;
}

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In reply to Reg Ex exercise by keesturam

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