Understanding var, let, and const in JavaScript #js #javascript #jsx #reactjs #nextjs #oop #variable

In JavaScript, var, let, and const are used for variable declarations, but they differ in their scope, hoisting behavior, and mutability.
- **var**: Declares variables with function scope, is hoisted, and can be redeclared and reassigned.
- **let**: Introduces block scope, is not hoisted, and can be reassigned but not redeclared.
- **const**: Also introduces block scope, is not hoisted, and cannot be reassigned or redeclared.

Understanding these differences is crucial for writing maintainable and bug-free JavaScript code.

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