Nowadays JavaScript has three different keywords to declare a variable — var, let and, const. Each has its own properties and particularities. Let’s start by making a simple comparison table ...

Learn what variables are, how to declare them, and what rules and conventions to follow when naming them in PHP, a popular scripting language for web development.

eWEEK content and product recommendations are editorially independent. We may make money when you click on links to our partners. Learn More. In this, Part 4 of a series on programming T-SQL ...