Extended Shell

This C program is a **basic custom shell** that allows users to execute Linux commands and manage local variables. It supports:

* Assigning variables (e.g., `x = 10`)

* Viewing all local variables using `set`

* Exporting variables to the environment with `export variable_name`

* Executing system commands via `fork()` and `execvp()`

It demonstrates fundamental **shell concepts** such as input parsing, process creation, variable storage, and environment management.