---
id: 642df9df4b5216350de7b0d2
title: Step 6
challengeType: 0
dashedName: step-6
---
# --description--
You will need a function to generate a range of numbers.
Declare an empty `range` function which takes a `start` and `end` parameter. Use the `Array()` constructor and implicitly return an empty array.
# --hints--
You should declare a `range` variable.
```js
assert.match(code, /(?:let|var|const)\s+range/);
```
You should use `const` to declare your `range` variable.
```js
assert.match(code, /const\s+range/);
```
Your `range` variable should be a function.
```js
assert.isFunction(range);
```
Your `range` function should use arrow syntax.
```js
assert.match(code, /const\s+range\s*=\s*\(.*\)\s*=>/);
```
Your `range` function should take a `start` parameter first.
```js
assert.match(code, /const\s+range\s*=\s*\(\s*start/)
```
Your `range` function should take an `end` parameter second.
```js
assert.match(code, /const\s+range\s*=\s*\(\s*start\s*,\s*end\s*\)/);
```
Your `range` function should use an implicit return. Remember that this means you will not use curly brackets.
```js
assert.notMatch(code, /const\s+range\s*=\s*\(\s*start\s*,\s*end\s*\)\s*=>\s*{/);
```
Your `range` function should use the `Array()` constructor. Primitive constructors do not need the `new` keyword.
```js
assert.match(code, /const\s+range\s*=\s*\(\s*start\s*,\s*end\s*\)\s*=>\s*Array\(/);
```
You should not pass anything to the `Array()` constructor.
```js
assert.match(code, /const\s+range\s*=\s*\(\s*start\s*,\s*end\s*\)\s*=>\s*Array\(\s*\)/);
```
# --seed--
## --seed-contents--
```html
Functional Programming Spreadsheet