CODEWITHSUNDEEP
regex
Ryan
Ryan

Reputation: 8241

Regular expression that matches strings containing exactly 10 digits

How would I write a regular expression (Python or Java) that matches strings that contain exactly 10 digits (0-9). I don't care if it contains any other characters, and the 10 digits do not have to be consecutive. For example, I want to following strings to match: "2fdf675&*85y989$%#0" and "3h2j9f88__+=123..54". Any ideas on how to go about doing this??

Upvotes: 2

Views: 1478

Answers (3)

Bohemian
Bohemian

Reputation: 424983

Here's a regex and java code:

if (str.matches("(\\D*\\d){10}\\D*")) // FYI ^ and $ are implied in java

But in java here's an easier way to comprehend:

if (str.replaceAll("\\D", "").length() == 10)

This just removes all non-digits and checks the length of what's left.

Upvotes: 0

Andy Lester
Andy Lester

Reputation: 93636

It will probably be clearer if you don't try to cram everything into one regex. I don't know Java or Python, but here's what you could do in Perl:

$str =~ s/\D//g;  # Remove all non-digit characters
if ( length($str) == 10 ) ... # Must be left with 10 characters.

Upvotes: 0

hsz
hsz

Reputation: 152206

Just try with:

^\D*(?:\d\D*){10}$

Upvotes: 9

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