# Operator Types

An operator is a symbol that tells the interpreter to perform specific mathematical, relational, or logical operations and produce the final result. This section details the operators available in GPC.

**=** is the assignment operator. Think of this as gets set to rather than equal to. When **=** is used, the left operand gets set to the value of the right operand. There are also a number of short hands for common tasks such as incrementing a value by a set amount.

Operator | Description |
---|---|

= | Sets the left operand to the value of the right operand |

+= | Sets the left operand to the value of the left operand plus the right operand |

-= | Sets the left operand to the value of the left operand minus the right operand |

*= | Sets the left operand to the value of the left operand multiplied by the right operand |

/= | Sets the left operand to the value of the left operand divided by the right operand |

%= | Sets the left operand to the remainder of dividing the left operand by the right operand |

In the example below, assume **a** holds a value of **10**.

It is often necessary to perform arithmetic on two values. The following table lists the arithmetic operators available in GPC.

Operator | Description |
---|---|

+ | Adds two operands |

- | Subtracts right operand from the left operand |

* | Multiplies both operands |

/ | Divides the left operand by the right operand |

% | Modulus, gives the remainder of an integer division |

++ | Increments by 1 |

-- | Decrements by 1 |

In the example below, assume **a** holds a value of **10** and **b** holds a value of **5**.

Note, GPC does not support fractions so the division operator / will drop any fractions. For example, **10 / 3 = 3** as the fraction is dropped. It also does not round, so **3 / 4 = 0** and not **1**.

Logical operators are important in any programming language as they allow to tell the interpreter to make decisions based on certain conditions. The following table lists the logical operators within the GPC language.

Operator | Description |
---|---|

&& | AND operator, if both operators are TRUE then the condition becomes TRUE |

|| | OR operator, if either operand is TRUE then the condition becomes TRUE |

^^ | XOR operator, if either operand is TRUE but not both then the condition becomes TRUE |

! | NOT operator. Reverses the logical state of an operand. |

In the example below, assume **a** holds a value of **1** and **b** holds a value of **0**.

Relational operators produce boolean results (**TRUE** or **FALSE**) while comparing two operands. The following tables list the relational operands which are available in GPC.

Operator | Description |
---|---|

== | Equal to, if the left operand holds the same value as the right then the condition becomes TRUE |

!= | Not equal to, if the left operand does not hold the same value as the right then the condition becomes TRUE |

> | Greater than, if the left operand holds a value greater than the left then the condition becomes TRUE |

< | Less than, if the left operand holds a value less than the left then the condition becomes TRUE |

>= | Greater than or equal to, if the left operand holds a value which is greater than or equal to the right then the condition becomes TRUE |

<= | Less than or equal to, if the left operand holds a value which is less than or equal to the right then the condition becomes TRUE |

In the example below, assume **a** holds a value of 30 and **b** holds a value of **10**.

Binary is the same as Logical, except they work with bits.

Operator | Description |
---|---|

& | AND operator, if both operators are TRUE then the condition becomes TRUE |

| | OR operator, if either operand is TRUE then the condition becomes TRUE |

^ | XOR operator, if either operand is TRUE but not both then the condition becomes TRUE |

<< | Left Shift operator, Less than, if the left operand holds a value less than the left then the condition becomes TRUE |

>> | Right Shift operator, Greater than, if the left operand holds a value greater than the left then the condition becomes TRUE |

- | NOT operator, Subtracts right operand from the left operand |

In the example below,