+
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/
.
```js
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 the entire phrase "Oh no"
only when it has 3
to 6
letter h
's.
"Ohh no"
testString: assert(!ohRegex.test("Ohh no"));
- text: Your regex should match "Ohhh no"
testString: assert("Ohhh no".match(ohRegex)[0].length === 7);
- text: Your regex should match "Ohhhh no"
testString: assert("Ohhhh no".match(ohRegex)[0].length === 8);
- text: Your regex should match "Ohhhhh no"
testString: assert("Ohhhhh no".match(ohRegex)[0].length === 9);
- text: Your regex should match "Ohhhhhh no"
testString: assert("Ohhhhhh no".match(ohRegex)[0].length === 10);
- text: Your regex should not match "Ohhhhhhh no"
testString: assert(!ohRegex.test("Ohhhhhhh no"));
```