var highscore: int = 0

assigning highscore variable a 0 integer

var ⇒ variable data can be changed

let ⇒ variable data is constant

Types

1. Int:

• Represents whole numbers (positive, negative, or zero).
• Can store values within a specific range depending on its signedness (e.g., Int vs. UInt).
• Used for counting, indexing, and calculations where precision beyond whole numbers is not needed.

2. Double:

• Represents floating-point numbers with a wider range and higher precision than float.
• Stores numbers with decimal parts up to 15-16 significant digits.
• Used for scientific calculations, financial data, and other situations requiring high accuracy.

3. Float:

• Represents floating-point numbers with a smaller range and lower precision than double.
• Stores numbers with decimal parts up to 6-7 significant digits.