first character 1

Oostwijk · Mar 23, 2004

How to check if the first character in a string is a number ?

cgimonk · Mar 23, 2004

Code:

if (/^\d/)
{
....
}

Will work I /think/. I could be wrong.

Oostwijk · Mar 23, 2004

where in the code can I place the string ?

ishnid · Mar 23, 2004

cgimonk's code assumes that your string is $_. To use another:

Code:

if ($string =~ /^\d/)
{
....
}

Oostwijk · Mar 23, 2004

It doesn't seem to work, anyone got another suggestion ?

siberian · Mar 23, 2004

Worked for me, maybe your string is really NOT a number?

Code:

$string = "1234";
if ($string =~ /^\d/)
{
print "I am a number";
} else { print "I am NOT a number";}

mikevh · Mar 23, 2004

It should work, if the first char is really a digit.
Is there whitespace before the number? Then you might try

Code:

if ($string =~ /^\s*\d/)
{
....
}

This allows for zero or more whitepace chars before the digit, so will work if there's whitespace before or not.