sepnum – Print numbers in a "friendly" format

Pro­vides a com­mand to print a num­ber with (po­ten­tially dif­fer­ent) sep­a­ra­tors ev­ery three dig­its in the parts ei­ther side of the dec­i­mal point (the point it­self is also con­fig­urable). The macro is fully ex­pand­able and not frag­ile (un­less one of the sep­a­ra­tors is). There is also a com­mand \sep­num­form, that may be used when defin­ing \the macros.