Erlang programming language and keyboard shortcuts and erlang language basic details. IDs shortcut keys.

Erlang programming Language Basic Details:

1. Purpose: Erlang is a functional programming language designed for building scalable, real-time systems with high availability.
2. Concurrency: It provides built-in support for concurrency, distribution, and fault tolerance.
3. Syntax: Erlang syntax is influenced by Prolog and functional programming languages like Lisp.
4. OTP: Erlang OTP (Open Telecom Platform) is a set of libraries and design principles for building robust systems.
5. Use Cases: Telecommunications, banking systems, multiplayer online games, and other systems requiring high concurrency and fault tolerance.

Erlang Shortcut Keys:

• Compile: C-c C-k (in Emacs Erlang mode) compiles the current buffer.
• Load File: C-c C-l (in Emacs Erlang mode) loads the current buffer.
• Erlang Shell: Start with erl command.
• Comment/Uncomment: C-c C-c (in Emacs Erlang mode) comments or uncomments the current line or region.
• Help: C-h f (in Emacs Erlang mode) displays documentation for a function.

These shortcuts are commonly used in Emacs Erlang mode, which is a popular environment for developing in Erlang. If you use a different editor or IDE, the shortcut keys may vary.

Basic Erlang Example:

Here’s a simple example to illustrate the basics of Erlang:

Factorial Calculation

% Define a module named 'factorial'
-module(factorial).
% Export the 'fact' function with 1 argument
-export([fact/1]).

% Base case: factorial of 0 is 1
fact(0) -> 1;
% Recursive case: N! = N * (N-1)!
fact(N) when N > 0 -> N * fact(N - 1).

To compile and run this example:

1. Save the code in a file named factorial.erl.
2. Open the Erlang shell and compile the module:

   erl
   1> c(factorial).

3. Call the fact function:

   2> factorial:fact(5).
   120

Shortcut Keys Table:

These shortcuts help navigate and manage the Erlang shell effectively, boosting productivity and ease of use.

One Click

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