Return the smallest integral value greater than or equal to {expr} as a |Float| (round up). {expr} must evaluate to a |Float| or a |Number|. Examples: echo ceil(1.456) 2.0 echo ceil(-5.456) -5.0 echo ceil(4.0) 4.0 Returns 0.0 if {expr} is not a |Float| or a |Number|. Can also be used as a |method|: Compute()->ceil() {only available when compiled with the |+float| feature}