Arithmetic Operators

Arithmetic operators perform normal mathematical operations. Several of these operators merit a word of explanation. The backslash (\) represents integer division. Integer division rounds its operands to integers, to produce a truncated quotient with no remainder. For example, 5 \ 2 evaluates to 2, and 9 \ 10 evaluates to 0. Integer division is also faster than floating-point division when using integer-class variables or expressions.

The remainder of an integer division can be determined with the MOD (modulo) operator (MOD is valid for all numeric types). MOD is similar to integer division except that it returns the remainder of the division rather than the quotient. For example, 5 MOD 2 returns the value 1, and 9 MOD 10 returns the value 9.

The ISTRUE operator returns TRUE only if its operand is TRUE (non-zero). ISTRUE is guaranteed to return -1 as its TRUE value, whereas the operators can return any non-zero value.

The ISFALSE operator returns TRUE only if its operand is FALSE (zero). ISFALSE is guaranteed to return -1 as its TRUE value, where the operators can return any non-zero value.

PowerBASIC arithmetic operators

Operator	Action	Example
^	Exponentiation	10^4
-	Negation	-16
*	Multiplication	45 * 19
/	Floating-point division	45 / 19
\	Integer division	45 \ 19
MOD	Modulo	45 MOD 19
+	Add	45 + 19
-	Subtract	45 - 19
ISFALSE	Boolean False	ISFALSE 45
ISTRUE	Boolean True	ISTRUE 19
NOT, AND, OR, XOR, EQV, IMP	Bit manipulation operations	NOT 0, 45 AND 19 45 OR 19, 45 XOR 19 45 EQV 19, 45 IMP 19

Note: PowerBASIC does not trap numeric overflow or underflow errors in equation and expression evaluation. Please refer to the chapter Errors and Error Trapping for more information.

It is recommended that this table be read in conjunction with the Mathematical Order of Operator Precedence table, and the effects that operator precedence has on the evaluation of numeric expressions.