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 ...

In essence, the wise JavaScript developer is ecumenical when it comes to programming paradigms. JavaScript offers object-oriented programming, functional programming, imperative programming, and ...

i.e. intuitively it looks like the variable will only be available within the block but it is accessible outside the block .. in javascript's case, because var doesn't make a block level ...