These operators are fairly self explanatory. The +, -, /,
and * operators respectively add, subtract, multiply, and divide two
values. The ++ and -- unary operators respectively add and
subtract one to their operand (they don't modify the operand in place like
C, so ++a is invalid, use ++a >> a instead). They can only be
used
with numeric operands, with the exception of + which can also be used
with string operands. The +, ++, -, and -- operators
can also be used with date operands, where they add or subtract days (or add
or subtract two dates).
Go to the first, previous, next, last section, table of contents.