The terms int, Int16, Int32, and Int64 represent integer data types with different storage capacities.
1. int: In most programming languages, this is a default integer type whose size depends on the platform (e.g., 32-bit or 64-bit).
2. Int16: A 16-bit signed integer that can store values from -32,768 to 32,767.
3. Int32: A 32-bit signed integer with a range of -2,147,483,648 to 2,147,483,647.
4. Int64: A 64-bit signed integer supporting values from -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807.
The choice depends on the required range and memory optimization.