Erlang-Fundamentals

Hello World in Erlang

Every programming journey starts with Hello World. Let’s write our first Erlang program and explore what makes this concurrent functional language tick.

The Code

Create a file named hello.erl: …

Variables and Types in Erlang

Erlang is a dynamically typed, functional language where all data is immutable and variables are single-assignment. Once a variable is bound to a value, it cannot be changed within the same scope. …

Operators in Erlang

Operators in Erlang are expressions that combine values to produce new values. Because Erlang is a functional language with immutable data, operators never mutate their arguments — they always return …

Control Flow in Erlang

Control flow is how a program decides what to do next. Most languages reach for if, for, and while to make those decisions. Erlang has an if, but as a multi-paradigm functional language it leans on …

Functions in Erlang

Functions are not just a feature of Erlang - they are the entire program. As a functional language, Erlang has no statements, loops, or mutable variables to fall back on. Everything you do is …

I/O Operations in Erlang

Input and output are where a pure functional language meets the messy outside world. Erlang keeps its data immutable and its functions honest, but reading a keypress or writing a file is inherently a …