# 11. what is Composition? create a pipe()

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what is Composition? It is actually not that difficult to understand, see @dan_abramov 's explanation.

Here you are asked to create a `pipe()`

function, which chains multiple functions together to create a new function.

Suppose we have some simple functions like this

```
const times = (y) => (x) => x * y
const plus = (y) => (x) => x + y
const subtract = (y) => (x) => x - y
const divide = (y) => (x) => x / y
```

Your `pipe()`

would be used to generate new functions

```
pipe([
times(2),
times(3)
])
// x * 2 * 3
pipe([
times(2),
plus(3),
times(4)
])
// (x * 2 + 3) * 4
pipe([
times(2),
subtract(3),
divide(4)
])
// (x * 2 - 3) / 4
```

**notes**

- to make things simple, functions passed to
`pipe()`

will all accept 1 argument