| Code | Not defined ({{Template}})
|
Defined, empty ({{Template|param=}})
|
Defined, not empty ({{Template|param=foobar}})
|
|---|---|---|---|
{{ #if: {{{param|}}} | yes | no }}
|
no | no | yes |
{{ #if: {{{param}}} | yes | no }}
|
yes | no | yes |
{{ #ifeq: {{{param|}}} | <!-- empty --> | yes | no }}
|
yes | yes | no |
{{ #ifeq: {{{param}}} | <!-- empty --> | yes | no }}
|
no | yes | no |
{{ #ifeq: {{{param|¬}}} | ¬ | yes | no }}
|
yes | no | no |
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