> For the complete documentation index, see [llms.txt](https://trizen.gitbook.io/sidef-lang/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://trizen.gitbook.io/sidef-lang/programming_tasks/e/eulers_identity.md).

# Euler's identity

```ruby
say ('e**i⁢π + 1 ≅ 0 : ', Num.e**Num.pi.i + 1 ≅ 0)
say ('Error: ', Num.e**Num.pi.i + 1)
```

## Output:

```
e**i⁢π + 1 ≅ 0 : true
Error: -2.42661922624586582047028764157944836122122513308e-58i
```