Arithmetic Operators
Remember basic arithmetic from school? These work just like those.
Table 10-2. Arithmetic Operators
ExampleNameResult$a + $bAdditionSum of $a and $b.$a - $bSubtractionDifference of $a and $b.$a * $bMultiplicationProduct of $a and $b.$a / $bDivisionQuotient of $a and $b.$a % $bModulusRemainder of $a divided by $b.The division operator ("/") returns a float value anytime, even if the two operands are integers (or strings that get converted to integers).
See also the manual page on Math functions.
