# [05AB1E], 5 [bytes]

    ∞å0k>

[Try it online!][TIO-lelfds6u]

[05AB1E]: https://github.com/Adriandmen/05AB1E
[TIO-lelfds6u]: https://tio.run/##yy9OTMpM/f//Uce8w0sNsu3@/4821FEw0lEwjgUA "05AB1E – Try It Online"

[bytes]: https://github.com/Adriandmen/05AB1E/wiki/Codepage

#### Explanation

```python
∞å0k>  # Implicit input
∞      # For each number in the infinite list [1, 2, 3, ...]
 å     # Is it in the input?
  0k   # Get the index of the first 0 (0-indexed)
    >  # And increment it to make it 1-indexed
```