In the olden days (1995), JavaScript had one way to declare a non-global variable, var. Using the keyword var creates local variable, meaning that it is only accessible inside the current function in ...

In the olden days (1995), JavaScript had one way to declare a non-global variable, var. Using the keyword var creates local variable, meaning that it is only accessible inside the current function in ...

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 ...

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.

Variables are made to receive values directly or through evaluated expressions compounding values and operators or results of function calls: the value is stored internally and the variable references ...

JavaScript vs. TypeScript example TypeScript's type system has a minor impact on how variables are referenced and declared, yet it has a huge impact on maintainability and consistency. For example, ...

Developers use statements to control the overall program flow, including variable declarations, conditional operations, and iterative processes. Here's how to write JavaScript statements.