+
to look for one or more characters and the asterisk *
to look for zero or more characters. These are convenient but sometimes you want to match a certain range of patterns.
You can specify the lower and upper number of patterns with quantity specifiers
. Quantity specifiers are used with curly brackets ({
and }
). You put two numbers between the curly brackets - for the lower and upper number of patterns.
For example, to match only the letter a
appearing between 3
and 5
times in the string "ah"
, your regex would be /a{3,5}h/
.
let A4 = "aaaah";
let A2 = "aah";
let multipleA = /a{3,5}h/;
multipleA.test(A4); // Returns true
multipleA.test(A2); // Returns false
ohRegex
to match only 3
to 6
letter h
's in the word "Oh no"
.
"Ohh no"
testString: assert(!ohRegex.test("Ohh no"), 'Your regex should not match "Ohh no"
');
- text: Your regex should match "Ohhh no"
testString: assert(ohRegex.test("Ohhh no"), 'Your regex should match "Ohhh no"
');
- text: Your regex should match "Ohhhh no"
testString: assert(ohRegex.test("Ohhhh no"), 'Your regex should match "Ohhhh no"
');
- text: Your regex should match "Ohhhhh no"
testString: assert(ohRegex.test("Ohhhhh no"), 'Your regex should match "Ohhhhh no"
');
- text: Your regex should match "Ohhhhhh no"
testString: assert(ohRegex.test("Ohhhhhh no"), 'Your regex should match "Ohhhhhh no"
');
- text: Your regex should not match "Ohhhhhhh no"
testString: assert(!ohRegex.test("Ohhhhhhh no"), 'Your regex should not match "Ohhhhhhh no"
');
```