[Tutor] Difference between %f and %F string formatting?

[boB Stepp]

My Google-fu must be weak tonight.  I cannot find any discernible
difference between '%f' % <some floating point number> and '%F' %
<some floating point number>.  Is there any or do they duplicate
functionality?  If the latter, why are there two ways of doing the
same thing?

I had a similar question for %d and %i, but googling suggests these
are inherited from differences in handling input in the C language,
though I could not locate a Python example where there is a need for
one or the other.  Are there any relevant Python examples?

-- 
boB