Translations:Help:TemplateData/801/en
It refers to its order in the sequence, but it is one less than its actual position, since $1 is an array; 0 is the first one, 1 is the second, etc.
It refers to its order in the sequence, but it is one less than its actual position, since $1 is an array; 0 is the first one, 1 is the second, etc.