regexawkposix-ere

Match digits in [g]awk

I'm stumped! Trying to write an awk regex to match a string against 11 digits.

I've tried:

if (var ~ /^[0-9]{11}$/ )
if (var ~ /^([0-9]){11}$/ )
if (var ~ /^([0-9]{11})$/ )
if (var ~ /^[0-9]{11}/ ) # altho I really do need to check the whole str
if (var ~ /[0-9]{11}/ )

If I use this....

if (var ~ /^[0-9]+/ )

Then I get a match - but I need to check for exactly 11 digits.

Solution

  • You described your problem, but didn't tell us your awk version. It is an important information.

    but this may work for your case:

    if (var ~ /^[0-9]+$/ && length(var)==11)

    If we know the version, there could be simpler solution.