Check if Decimal representation of an Octal number is divisible by 7 in Python

Suppose we have one octal number. We have to check whether the decimal representation of the given octal number is divisible by 7 or not.

So, if the input is like n = 61, then the output will be True as the decimal representation of 61 is 6*8 + 1 = 48 + 1 = 49 which is divisible by 7.So, if the input is like n = 61, then the output will be True as the decimal representation of 61 is 6*8 + 1 = 48 + 1 = 49 which is divisible by 7.

To solve this, we will follow these steps −

• sum := 0
• while num is non-zero, do
  • sum := sum + (num mod 10)
  • num := quotient of (num / 10)
• if sum mod 7 is same as 0, then
  • return True
• return False

Let us see the following implementation to get better understanding −

Example

 Live Demo

def solve(num):
   sum = 0
   while num:
      sum += num % 10
      num = num // 10
   if sum % 7 == 0 :
      return True
   return False
num = 61
print(solve(num))

Input

61

Output

True

Arnab Chakraborty

Updated on: 30-Dec-2020

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