Can you use non-numerical values when converting a stack to a hyperstack?

I am trying to run:

run(“Stack to Hyperstack…”, “order=xyctz channels=1 slices=7 frames=101 display=Grayscale”);

But instead of “7” and “101” use variables like “nSlices” but keep getting an error. Is it possible to use non-numerical values for channels, slices, and frames?

Thanks!

n=7;
m=101;
run("Stack to Hyperstack…", "order=xyctz channels=1 slices="+n+" frames="+ m+" display=Grayscale");