Variables hold a wide variety of information temporarily. The JavaScript data types that can be stored in a variable include: JavaScript variables can hold a few other kinds of data, but these are by ...

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 of the ...

This is the most straightforward way. You take the current value of the variable, add or subtract the desired amount, and then assign the result back to the same variable. `let counter = 10; // ...