Function Entry: 1-
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Function Entry: 1-
Name
1-
Class
Function
Syntax
(1- number)
Arguments and Values
number: integer or real.
Description
Decrements number by 1.
Return Values
The input number minus 1. Return type matches input type.
Side Effects
None.
Examples
(1- 5)returns4.(1- -17.5)returns-18.5.
Availability
- AutoCAD 2026: documented.
- BricsCAD V26: presumed compatible.
- Status: AutoCAD documented; BricsCAD presumed-both pending Phase 4 verification.
Source Notes
- [1- (AutoLISP 2026)](https://help.autodesk.com/cloudhelp/2026/ENU/AutoCAD-AutoLISP-Reference/files/GUID-4E3A882A-959D-4B46-BA5E-5A3C1BDB3079.htm)
- Status: documented (Phase 3 body fill).