Differences & Similarities Between let, var, and const

🔹 Similarities

• Variable Declaration: All three (let, var, const) are used to declare variables.
• Storing Any Data Type: They can store any data type, including strings, numbers, objects, and arrays.

🔹 Differences

• let:
  • Has block scope (only accessible within the block `{ ... }` where it is declared).
  • Cannot be re-declared within the same scope.
  • Can be reassigned a new value.
• var:
  • Has function scope (accessible anywhere within the function).
  • Can be re-declared and reassigned.
  • Hoisted to the top of its scope but **not initialized**.
• const:
  • Has block scope (similar to `let`).
  • Cannot be re-assigned or re-declared.
  • Must be initialized at declaration (e.g., `const x = 10;` is valid, but `const x; x = 10;` is not).

Understanding these differences is crucial for writing efficient JavaScript code!