9!:12
< Vocabulary | Foreigns | 9
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Global Parameters/System Type
| 5 | Unix (includes iPhone) | IFUNIX
|
| 6 | Windows | IFWIN
|
| 7 | Windows CE | IFWINCE
|
| _1 | Other |
This is used in ~system/main/stdlib.ijs (which is loaded at the start of approximately every J session) to define some some truth valued system constants:
'IFUNIX IFWIN IFWINCE'=: 5 6 7 = 9!:12''
These constants should usually be preferred over direct use of 9!:12 because they're easier to understand.