how write if number is multiply of 5

[faustf]

hi guy 

how  can write  in  cicle if    , if  $b  is   multiply  of   5 ???

is  true  if   sb = 5 or 10 or 15 ........ ?? 

 

thankz

 

[faustf]

i  answer me  sorry

 

If Mod( $b, 5) = 0 Then