The I do not understand. I am testing if a dimension set can be checked against the expected value.
It looks like 100.0pt is not really 100.0pt. Why? And how can I do this test properly with true as result?

	    	\scratchdimen=100pt\relax
	    	\iftok{\the\scratchdimen}{100.0pt}true\else false\fi


printing \the\scratchdimen results in 100.0pt

while \meaning\scratchdimen results in: constant dimension 100.0pt

yours sincerely
dr. Hans van der Meer