## Operators

To build FlowForce expressions, you can use the operators listed below. Remember that you can test any expression by calling the built-in function system/compute.

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

== | Checks if a and b are equal (numerically equal for numbers, code-point equal for strings). | 2 + 3 == 5 computes to true
2 + 3 == 4 computes to false |

!= | Checks if a and b are not equal. Note that the following three expressions are equivalent:
•a != b •not (a == b) •a <> b | 2 + 2 != 5 computes to true
3 + 2 != 5 computes to false |

< | Checks if a is less than b (numerically less for numbers, see below for strings). | 4 < 5 computes to true |

<= | Checks if a is less than or equal to b. | 5 <= 5 computes to true |

> | Checks if a is greater than b. | 5 > 1 computes to true |

>= | Checks if a is greater than or equal to b. | 5 >= 5 computes to true |

+ | Addition. | 1 + 1 computes to 2 |

- | Subtraction. | 2 - 1 computes to 1 |

* | Multiplication. | 3 * 2 computes to 6 |

/ | Division. | 6 / 3 computes to 2 |

String comparisons are performed as follows:

•The common prefix of the two strings are ignored (evaluated on code points)

•If both remaining strings are non-empty, their first code points are compared numerically

•Empty strings are less than non-empty strings

Use parentheses to instruct FlowForce to evaluate the expression inside first. For example:

2 + 3 * 4 computes to 14.

(2 + 3) * 4 computes to 20.