Return the largest integral value less than or equal to {expr} as a |Float| (round down). {expr} must evaluate to a |Float| or a |Number|. Examples: echo floor(1.856) 1.0 echo floor(-5.456) -6.0 echo floor(4.0) 4.0 Can also be used as a |method|: Compute()->floor() {only available when compiled with the |+float| feature}