8.2.14 Negation and Subtraction Operator (-)

Used to find the difference between two expressions or to indicate the negative value of a numeric expression.
Syntax 1
result = expression1-expression2
Syntax 2
-expression
Arguments
- result
- Any numeric variable.
- expression
- Any numeric expression.
- expression1
- Any numeric expression.
- expression2
- Any numeric expression.
Remarks
In Syntax 1, the - operator is the arithmetic subtraction operator used to find the difference between two numbers. In Syntax 2, the - operator is used as the unary negation operator to indicate the negative value of an expression.
If one or both expressions are Null expressions, result is Null. If an expression is Empty, it is treated as if it were 0.
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