“IsDefined 指令”的版本间的差异
来自GeoGebra Manual
(Autogenerated from properties) |
(en) |
||
第2行: | 第2行: | ||
;IsDefined[ <Object> ] | ;IsDefined[ <Object> ] | ||
:{{translate|IsDefined Command}} | :{{translate|IsDefined Command}} | ||
+ | ; IsDefined[Object]: Returns ''true'' or ''false'' depending on whether the object is defined or not. |