Web Reference: Jul 8, 2025 ยท The const declaration declares block-scoped local variables. The value of a constant can't be changed through reassignment using the assignment operator, but if a constant is an object, its properties can be added, updated, or removed. Declaring a variable with const is similar to let when it comes to Block Scope. The x declared in the block, in this example, is not the same as the x declared outside the block: A JavaScript variable is a container for storing data, while a constant is a variable whose value cannot be changed. In this tutorial, you will learn about JavaScript variables and constants with the help of examples.
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