<includeonly>{{Ordinal|{{#expr:{{{1}}}+not{{{1}}}}}}} {{#ifexpr:{{#ifeq:{{{2|AD}}}|BC|1|0}}=not{{{1}}}|{{{cm|Rautau}}}|{{{cm|Rautau}}} {{{bc|BC}}}}}</includeonly><noinclude>This template
*converts {{{1}}} to ''{{{1}}}th century (BC)'' (''BC'' is included iff {{{2}}}=''BC''), 
*handles {{{1}}}=0 correctly & 
*allows for alternatives to ''century'' & ''BC'' (respective defaults of {{{cm}}} & {{{bc}}}).</noinclude>