Addition Operator (+)
result = expression1 + expression2
The + operator syntax has these parts:
|result||Any numeric variable.|
Although you can also use the + operator to concatenate two character strings, you should use the & operator for concatenation to eliminate ambiguity and provide self-documenting code.
When you use the + operator, you may not be able to determine whether addition or string concatenation will occur.
The underlying subtype of the expressions determines the behavior of the + operator in the following way:
|Both expressions are numeric||Add.|
|Both expressions are strings||Concatenate.|
|One expression is numeric and the other is a string||Add.|
If both expressions are Empty, result is an Integer subtype. However, if only one expression is Empty, the other expression is returned unchanged as result.