---
title: every
tags: list,function,intermediate
---

Returns `True` if the provided function returns `True` for every element in the list, `False` otherwise.

Use `all()` in combination with `map` and `fn` to check if `fn` returns `True` for all elements in the list.

```py
def every(lst, fn=lambda x: x):
  return all(map(fn, lst))
```

```py
every([4, 2, 3], lambda x: x > 1) # True
every([1, 2, 3]) # True
```