# Range A few recipe requirements such as [Time](https://frinn.gitbook.io/custom-machinery-1.19/recipes/requirements/time) or [Position](https://frinn.gitbook.io/custom-machinery-1.19/recipes/requirements/position) need a range to function properly. The range can be an unique number (in that case just specify it) or a range of values starting from negative infinity (**-2147483648**) to positive infinity (**2147483647**). Several ranges can also be specified, in that case the tested value must match at least one of the specified range to pass. ### Syntax : The range must be specified with the following syntax : 1. Start with `[` (lower bound included) or `(` (lower bound excluded). 2. A number which will be the lower bound of the range, or nothing if you want no lower bound. 3. A `,` to separate the lower bound from the upper bound. 4. A number which will be the upper bound of the range, or nothing if you want no upper bound. 5. End with `]` (upper bound included) or `)` (upper bound excluded). 6. If you want to specify another range ### Special cases : * Use `""` or `"*"` to make a range that accept any values. * Use `"1"` to make a range that accept only the number 1. ### Examples : Some range examples are:
SpecDescription
"1"Accept only 1
"[1,42)"Accept 1 (included) to 42 (not included)
"[1,42]"Accept 1 to 42 (both included)
"[1,)"Accept 1 and higher
"(,1],[42,)"Accept up to 1 (included) and 42 or higher