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  1. Recursive Digit Sum
  2. Discussions

Recursive Digit Sum

  • erlandohbs
     + 0 comments

    you need to sum first before combine the string

    very manual way in python

    def combineMethod(n,k):
    return str(n)*k

def sumCurrentDigit(current):
    sum = 0
    for record in current:
        sum += int(record)
    return sum

def getSuperDigit(combineDigit):
    super = None
    current = list(str(combineDigit))
    while(True):
        if len(current) ==1:
            super = current
            break
        sumDg = sumCurrentDigit(current)
        current = list(str(sumDg))
    return super
def superDigit(n, k):
    # Write your code here
    sumCurrent = sumCurrentDigit(n)
    combineDigit = combineMethod(sumCurrent,k)
    super = getSuperDigit(combineDigit)
    super = super[0]
    super = int(super)
    return super