Learn about variables in JavaScript, how to declare them, assign values, and manipulate their content.

• A variable acts like a box or container storing a piece of information known as its value.
• Example:

  let box;

• Variable names should be descriptive and relevant.
• They follow the camelCase convention (e.g., userName, totalAmount).
• Restrictions:
  • Cannot start with a number.
  • Cannot be reserved keywords (like let).

• After declaring a variable, we can assign a value to it.
• Example:

  let box;
  box = 8;

• Numbers: Numerical values, can be positive, negative, or decimals.
• Strings: Series of characters enclosed within quotation marks (either single ' ' or double " ").

• Used to perform arithmetic operations on variables.
• Basic ones include: +, -, *, /.