Quantifier ↔ RegExp Syntax to express # repetitions to match

?

Optional RegExp Quantifier to match never or once

*

≥0 RegExp Quantifier to match zero or more

+

≥1 RegExp Quantifier to match 1+

{n}

RegExp Quantifier to match exactly n times

{n,}

RegExp Quantifier to match n or more times

{n,m}

RegExp Quantifier to match between n-m times

.*

RegExp Quantifier to match anything & everything

.*abc.*

RegExp Quantifier to match any phrase contains abc between anything/nothing

^n

RegExp Quantifier to match n string at line begin

?=n

RegExp Quantifier to match string after n string

?!n

RegExp Quantifier to match string not after n string

References

1. + ↔ ≥1 RegExp Quantifier to match 1+

2. * ↔ ≥0 RegExp Quantifier to match zero or more

3. ? ↔ Optional RegExp Quantifier to match never or once

4. ^n ↔ RegExp Quantifier to match n string at line begin

5. ?!n ↔ RegExp Quantifier to match string not after n string

6. ?=n ↔ RegExp Quantifier to match string after n string

7. {n,} ↔ RegExp Quantifier to match n or more times

8. {n,m} ↔ RegExp Quantifier to match between n-m times

9. {n} ↔ RegExp Quantifier to match exactly n times

10. .* ↔ RegExp Quantifier to match anything & everything

11. .*abc.* ↔ RegExp Quantifier to match any phrase contains abc between anything/nothing

12. Reluctant ↔ behavior for Quantifier to match as few chars possible

13. Greedy ↔ (default) behavior for Quantifier to match as many chars possible

14. Lazy ↔ behavior for Quantifier to match once then stop