RosettaCodeData/Task/Digital-root/Ring/digital-root.ring

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c = 0
see "Digital root of 627615 is " + digitRoot(627615, 10) + " persistance is " + c + nl
see "Digital root of 39390 is " + digitRoot(39390, 10) + " persistance is " + c + nl
see "Digital root of 588225 is " + digitRoot(588225, 10) + " persistance is " + c + nl
see "Digital root of 9992 is " + digitRoot(9992, 10) + " persistance is " + c + nl
func digitRoot n,b
c = 0
while n >= b
c = c + 1
n = digSum(n, b)
end
return n
func digSum n, b
s = 0
while n != 0
q = floor(n / b)
s = s + n - q * b
n = q
end
return s