What data type can contain a decimal?

The data type that can contain a decimal is the REAL data type. In programming and control systems, particularly in the context of Rockwell ControlLogix, REAL represents a floating-point number, which allows for both integer values and decimal precision. This means that values can be expressed with fractional components, making it ideal for operations that require a high degree of accuracy, such as mathematical calculations involving measurements, process control, or any situation where decimals are essential.

Other data types, like Integer, are limited to whole numbers and cannot represent decimal values. String types are used for text data and can include characters and symbols but do not function in numerical mathematical operations without conversion. Boolean data types are designed to hold true/false values, which do not pertain to decimal or numeric representations. Thus, REAL is the appropriate choice for cases requiring the inclusion of decimal values.