**(round: // [[harlowe:Number|Number]]//) -> //Number//**

This macro rounds the given [[harlowe:number|number]] to the nearest whole number - downward if
its decimals are smaller than 0.5, and upward otherwise. If a whole number is provided,
it returns the number as-is.

=== Example usage: ===

''%%(round: 1.5)%%'' produces 2.