Shebang is a feature.
In computing, a shebang is the character sequence consisting of the characters number sign and exclamation mark (#!) at the beginning of a script. It is also called sha-bang, hashbang, pound-bang, or hash-pling.
Languages with Shebang include Python, Elixir, Erlang, Bourne shell, Boron
#!/usr/bin/env python
#!/usr/bin/env elixir
#!/usr/bin/env escript
#!/bin/sh -x
#!/usr/bin/env boron