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
QWhat is the regex for runs of digits inside a text?
\d+.
QWhich strings match?
Text like a1b22 matches; text like abc does not.
QDoes 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.
QHow 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.