# CALCINPUT System Variable [GstarCAD 2027](Help%20System/GSTARCAD/2027/Index.md) → [System Variables](Help%20System/GSTARCAD/2027/System%20Variables/(System%20Variables).md) **Function Description:** The CALCINPUT system variable is used to control whether to calculate the mathematical expressions and global constants in text or numeric entry boxes of windows and dialog boxes. | | | | --- | --- | | Type | Integer | | Saved in | Registry | | Initial value | 1 | | Range | 0,1 | **System Variable Value:** **0:** do not calculate expressions **1:**calculate expressions after pressing ALT+Enter --- [Original help](https://www.gstarcad.net/help/GstarCAD_2027_en-US/detail/systemVariables/CALCINPUT.html) · © Gstarsoft Co., Ltd.