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How to find keith numbers using Python?
You can use the following code to find if a number is a keith number in python −
Example
def is_keith_number(n): # Find sum of digits by first getting an array of all digits then adding them c = str(n) a = list(map(int, c)) b = sum(a) # Now check if the number is a keith number # For example, 14 is a keith number because: # 1+4 = 5 # 4+5 = 9 # 5+9 = 14 while b < n: a = a[1:] + [b] b = sum(a) return (b == n) & (len(c) > 1) print(is_keith_number(14))
Output
This will give the output −
True
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