Equation to measure length of a 3D Sketch

Hi,

As far as I know, I can measure the length by using the MEASURE tool and selecting all the chain, either selecting item by item or chossing the chain option.

I would like to measure the length of a path made in 3D Sketch but using an equation not the Measure tool. Is that possible? Does exist a length function??

SolidworksDrawings And Detailing