Coding with the Shell

The command-line interface is a powerful tool for coding. It is a very common practice among developers to write, compile, and run code directly from the shell. Below are examples for C++ and Python.

C++

Use a text editor like Nano, Vim, or Emacs to create a C++ file. For example, to create a file named hello.cpp:

  nano hello.cpp

Inside the editor, write your C++ code. Here’s a simple “Hello, World!” program in C++:

  #include <iostream>
  using namespace std;

  int main() {
      cout << "Hello, World!" << endl;
      return 0;
  }

To save and exit:

1. Press Ctrl + X to initiate the exit command.
2. Nano will prompt you to confirm. Press Y for yes.
3. Nano will then ask if you want to save changes. Press Enter to confirm.

Then Compile your C++ code using the g++ compiler. To install g++ compiler use this command:

  apt install g++

For example, if your code is in hello.cpp:

  g++ hello.cpp -o hello

This command compiles hello.cpp and creates an executable named hello.

Run the compiled C++ executable:

  ./hello

Python

Create a Python file using a text editor like nano. For instance, to create a file named hello.py:

  nano hello.py

Then write your code:

  print("Hello, World!")

Save this code in a file with a .py extension, for example, hello.py, and then run it using the following command:

  python hello.py

Rememebr that you need to install python3 on your system first using:

  apt install python3

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