runs of digits inside a text
Matches runs of digits inside a text. It finds the match anywhere inside the text. There are no capture groups.
Pattern
/\d+/- Match scope
- anywhere inside the text
- Capture groups
- 0
- What it catches in the first example
- 1
Try it yourself
Type any text and the parts this expression catches are highlighted. It runs in your browser and is never sent anywhere.
a1b22
2024
3 matches
Examples that match
- a1b22
- 2024
Examples that do not match
- abc
- ""
Other expressions in this group
(?:^|,)("(?:[^"]|"")*"|[^,]+)one comma-separated field^([^=]+)=(.*)$a name and value split by an equals sign^\s*(\S+)the first word(\S+)\s*$the last word\b\w+\beach word, one by one\[([^\]]*)\]what sits inside square brackets\(([^)]*)\)what sits inside round brackets[\uD800-\uDBFF][\uDC00-\uDFFF]an emoji that takes two code unitsHow to read this
- With ^ and $ around it, the whole string must match; without them the match can sit anywhere. Always anchor an expression you use for validation.
- Round brackets ( ) capture what they wrap. When you only need grouping, write (?: ) so the numbering of later groups does not shift.
- Every expression here is checked against its examples. Even so, "looks like an email" and "is a real inbox" remain different questions.
- Nested open-ended repeats such as (a+)+ can blow up on certain inputs. Look for that shape before pasting someone else’s expression into your code.
Frequently asked questions
Q. What is the regex for runs of digits inside a text?
\d+.
Q. Which strings match?
Text like a1b22 matches; text like abc does not.
Q. Does the whole string have to match?
No. It finds the part anywhere inside the text. Add ^ and $ around it if you want a whole-string check.
Q. How do I use what it caught?
There are no capture groups, so only the whole match (match[0]) comes back. Wrap the part you need in brackets to capture it.