## 2.2.1 Constants

A constant is a data item with a fixed value that cannot be changed during program execution. The value of a constant can be a numeric value, a logical value, or a character string. A constant can be any of the following types:

- Integer

- Real

- Complex

- Bit

- Logical

- Character

- Hollerith

The term scalar reference is applied to all references that resolve into a single data item having a data type. References to any of the preceding types of constants are scalar references.

For More Information:

For details on scalar references, see Section 2.2.6.

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