I have a small problem with mod function when using US/Imperial units.

For values without units or SI units the mod function works file. But if I specify US/Imperial units the precision causes the mod function to give different results.

Any suggestions?

Also I would like to add a special character to variable names to signify a temporary variable or a parameter passed to a user defined function. I've tried # but sometimes it says function not defined. Any recommendation of a safe special character?

Andrey,

There are two screen shots on this page. The first without the "#" shows that mod(5ft,20ft/20) does not produce a whole number. There is approximately 1ft or 0.3048m left over fractionally. Curiously my amod function did produce a whole number.

The second screen shot with the "#" is to show that some characters are not accepted in variable names. Also I discovered some characters on the key board are short cut key strokes. For example "!" is factorial. I tried evey keystroke that I could think of. Most were either short cuts or not recognized.

Andrey,

The example you've shown will always give a fractional part.

mod(5,20) is equivalent to the integer of 5/20 = 0 and the remainder is 5 regardless of units.

For mod to work the first argument has to be larger than the second argument. Otherwise it will always return the first argument.

In my example its:

mod(5,20/20) or mod(5,1) which should give 0 but due to precision of units its nearly 1.

For the sake of discussion lets say it's mod(5,2) then the result would be 1. If it were mod(2,5) it would be 2.