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()