Arithmetic operators allow you to perform calculations.
expression + expression Addition. If either expression is NULL, the result is NULL.
expression - expression Subtraction. If either expression is NULL, the result is NULL.
- expression Negation. If the expression is NULL, the result is NULL.
expression * expression Multiplication. If either expression is NULL, the result is NULL.
expression / expression Division. If either expression is NULL or if the second expression is 0, the result is NULL.
expression % expression Modulo finds the integer remainder after a division involving two whole numbers. For example, 21 % 11 = 10 because 21 divided by 11 equals 1 with a remainder of 10. If either expression is NULL, the result is NULL.
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