JavaScript variables hold a wide variety of information and can be used with virtually any data type. Here's how to use variables to store numbers, text strings, objects, and more.

Pass a function as an argument to another function. Return a function from another function. Store functions in variables. This is a powerful feature of JavaScript, allowing us to use callback ...

Computer variables differ from mathematical variables in that they can store different values at different times. We tell JavaScript to create or declare a variable by putting the keyword var in front ...

In JavaScript, though, the same code is perfectly fine: This is because JavaScript scopes your variables to functions and not to if-blocks. But, we can achieve block-like scope through the use of ...

When we think about storing data for later, we often turn to variables, which simply store data for later use. ... JavaScript tutorial: Higher-order functions. Apr 18, 2019 4 mins. how-to.