![]() The type of a variable is determined by the type of the value assigned to it. With this in mind, it is critical to know the type of a variable at any given time. JavaScript code can execute like this: let one = 1 This means that a variable can contain a value of any type. JavaScript, however, is a loosely typed (or dynamically typed) language. This means that if a variable is defined with a specific type it can contain a value of only that type. Many programming languages like Java have strict type checking. Data types and type checking are fundamental aspects of any programming language.
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