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Diffstat (limited to 'Help/command/if.rst')
| -rw-r--r-- | Help/command/if.rst | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/Help/command/if.rst b/Help/command/if.rst index 6ff8852..b4b4897 100644 --- a/Help/command/if.rst +++ b/Help/command/if.rst @@ -61,7 +61,9 @@ Basic Expressions ``if(<variable|string>)`` True if given a variable that is defined to a value that is not a false - constant. False otherwise. (Note macro arguments are not variables.) + constant. False otherwise. Note that macro arguments are not variables. + Environment variables also cannot be tested this way, e.g. + ``if(ENV{some_var})`` will always evaluate to false. Logic Operators """"""""""""""" |