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determine whether a field is numeric, alpha or alphanumeric

junoon_hai_m... Posted: Sat May 21, 2005 10:17 am

Joined: 27 Apr 2005

Posts: 4

determine whether a field is numeric, alpha or alphanumeric

is their a function or way to determine whether a field, or variable
for that matter, is numeric, alpha or alphanumeric?
thanks in advance

paulalapatt Posted: Sun May 22, 2005 5:03 pm

Joined: 06 Apr 2005

Posts: 12

determine whether a field is numeric, alpha or alphanumeric

> is their a function or way to determine whether a field, or variable
> for that matter, is numeric, alpha or alphanumeric?
> thanks in advance

Yes you can use regular expressions for that

--- sample code ---

$ID = 2552399;
if($ID =~ /[d]+/) {
print qq{This is a digit};
}

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georges_toullat Posted: Sun May 22, 2005 10:39 pm

Joined: 22 May 2005

Posts: 3

determine whether a field is numeric, alpha or alphanumeric

Hi,

You can explore the following idea:

$x=11;
$y="This a string";

print "$x is a number" if !($x & ~$y);
print "$y is a string " if ($x & ~$y);

Regards,

Georges

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whinnim Posted: Tue May 24, 2005 1:19 pm

Joined: 07 Mar 2005

Posts: 4

determine whether a field is numeric, alpha or alphanumeric

junoon_hai_mujhe wrote:
> is their a function or way to determine whether a field, or variable
> for that matter, is numeric, alpha or alphanumeric?
> thanks in advance
perldoc -q "How do I determine whether a scalar is a
number/whole/integer/float?"

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