Which statement correctly describes how the size and range of a variable are determined?

Which statement correctly describes how the size and range of a variable are determined?

• A. By its data type
• B. By its name
• C. By the value assigned
• D. By the scope of the variable

Answer: (A)

The size and range of a variable come from its data type. The data type defines how many bits are used to store the value, which determines how much memory the variable occupies, and it also specifies which values can be represented by that type. For example, different integer types (short, int, long) use different numbers of bits and thus have different ranges. Character types occupy a fixed size and represent a fixed set of values, while floating-point types have their own distinct ranges and precision. The name of the variable is just an identifier, and its scope only affects where it can be used; neither changes how much space is allocated or which values are valid. The value you assign can change the content, but not the capacity defined by the type, except in languages with dynamic or arbitrary-precision numbers where the representation may grow, the underlying concept remains: the data type fixes size and range.

The size and range of a variable come from its data type. The data type defines how many bits are used to store the value, which determines how much memory the variable occupies, and it also specifies which values can be represented by that type. For example, different integer types (short, int, long) use different numbers of bits and thus have different ranges. Character types occupy a fixed size and represent a fixed set of values, while floating-point types have their own distinct ranges and precision. The name of the variable is just an identifier, and its scope only affects where it can be used; neither changes how much space is allocated or which values are valid. The value you assign can change the content, but not the capacity defined by the type, except in languages with dynamic or arbitrary-precision numbers where the representation may grow, the underlying concept remains: the data type fixes size and range.