**EVALuate (evaluate-statement)**- is a control statement.
**evaluate-statement:==****symbol = operation****operation:==****vflc [op operation ]****op:==**-
- denotes addition or concatenation for strings.
- denotes subtraction or unary minus or negative concatenation for strings.
- denotes multiplication.
- denotes division.
`^`- denotes exponentiation.
- denotes exponentiation (same as
`^`).

**vflc:==****functionsymbolrealintegerstring**deals with the fact that the data types of the operations and operands have to match; otherwise an error message is issued. The available functions, such as SIN, COS, and TAN, are defined in Section 2.16.