Which data type can contain an integer - a whole number, positive or negative?

• A. Floating Point
• B. Decimal
• C. String
• D. Integer

Answer: (D)

Integers are designed to store whole numbers, including negative values and zero, without any fractional part. This makes them the natural type for representing an integer. Floating-point types store numbers with decimals and can introduce rounding if treated as integers; decimal types are precise fixed-point numbers often used for currency and can represent whole numbers but are meant for decimal fractions; strings hold characters and cannot be used directly as numbers for arithmetic. So an integer is the correct choice when you need to store an integer value, positive or negative.