# Range
A few recipe requirements such as [Time](/custom-machinery-1.19/recipes/requirements/time.md) or [Position](/custom-machinery-1.19/recipes/requirements/position.md) 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:
Spec
Description
"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
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