Permissible Combinations of Symbols

The permissible combinations of variables, numeric literals, arithmetic operator and parentheses are given in TableĀ 1.

Table 1. Combination Of Symbols In Arithmetic Expressions
First Symbol Second Symbol
Variable * / ** + - B-AND B-OR B-XOR B-EXOR Unary + - B-NOT ( )
Variable - P - - P
* / ** + - B-AND B-OR B-XOR B-EXOR P - P P -
Unary + - B-NOT P - - P -
( P - P P -
) - P - - P
P indicates a permissible pair of symbols
- indicates an invalid pair
Variable indicates an identifier or literal