Output the absolute value of the input
| Name | Type | Opt | Description |
|---|---|---|---|
| number-format | int or float | opt | Float argument forces a float output. |
| int | input [int] |
The absolute (non-negative) value of the input is sent out the output. |
| float | input [float] |
Converted to , unless abs has a float argument. |

| Name | Description |
|---|---|
| expr | Evaluate a mathematical expression |