Declare Javascript Variables Basic Javascript KeLF6e9eSYQ

Web Reference: Declaring JavaScript Variables Creating a variable in JavaScript is called declaring a variable. You declare a JavaScript variable with the let keyword or the const keyword. Jan 19, 2026 · const is a keyword in JavaScript used to declare variables and it is Block-scoped, immutable bindings that can't be reassigned, though objects can still be mutated. When naming variables in JavaScript, follow these rules. Variable names must begin with a letter, underscore (_), or dollar sign ($). Jul 8, 2025 · This chapter discusses JavaScript's basic grammar, variable declarations, data types and literals.

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