Conditions

General description

A condition enables the program to select between two alternative paths of execution, depending upon the truth value of a test. There are two categories of conditions: simple conditions and complex conditions.

Simple conditions

1. Condition-name condition

2. Class condition

3. Switch-status condition

4. Condition-name condition

5. Sign condition

6. Omitted-argument condition

Each of these conditions may be enclosed in parentheses.

Complex conditions

Complex conditions are formed by combining simple conditions and/or complex conditions with the logical operators AND and OR or by negating these conditions with the logical operator NOT.