In JavaScript, a variable is a container that holds a value.

Variables are declared using the keyword "var", "let" or "const" and are assigned a value using the assignment operator (=).

The value stored in a variable can be of any data type, such as a string, number, or boolean. Variables can be used to store and manipulate data in a program.

In JavaScript, "var", "let", and "const" are used to declare variables.

• var is used to declare a variable that is accessible within the entire scope of the current function or script. Variables declared with var can be reassigned new values or re-declared in the same scope without throwing an error.

• let is used to declare a variable that is block-scoped, meaning it is only accessible within the block in which it was declared. Variables declared with let can be reassigned new values but cannot be re-declared in the same scope without throwing an error.

• const is used to declare a variable that is block-scoped and cannot be reassigned new values or re-declared in the same scope without throwing an error. A constant variable must be initialized with a value when it is declared.

In practice, let and const are recommended over var, as they give you more control over the scope and readability of your code.

Let me know your thoughts in the comments below!
Bye, for now! 👋 Diki