Arithmetic operators are used to perform numeric calculations. The operators available are the following:

• Addition: +
• Subtraction: -
• Multiplication: *
• Division: /
• Modulus: %
• Shift left: -shl
• Shift right: -shr

As well as numeric calculations, the addition operator may also be used with strings, arrays, and hashtables; the multiplication operator may also be used with strings and arrays.