From 9d3a7ed47feccd38429501bd481cb048136487ec Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Stefan=20Feje=C5=A1?= <ns.fejes.stefan@gmail.com>
Date: Tue, 17 Jul 2018 10:43:25 +0200
Subject: [PATCH] add glossary/Functional-programming

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 glossary/Functional-programming.md | 3 +++
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+### Functional programming
+
+Functional programming is a paradigm in which programs are built in a declarative manner using pure functions that avoid shared state and mutable data. Functions that always return the same value for the same input and don't produce side effects are the pillar of functional programming.