""" Converts a binary number to a decimal number. February 18th, 2019. Sébastien Lavoie """ def bin_to_dec(number): """Algorithm that converts a binary number to a decimal number. Receives and returns a string.""" # get the index of power of first digit # e.g. 1001 → first index power is 3 (2^3) first_power = len(number) - 1 total = 0 # initialize variable to store final result for index, char in enumerate(number): if char == '1': total += 2 ** (first_power - index) return total if __name__ == '__main__': # retrieve binary number from input as string to parse BIN_NUM = input() # pass binary number to algorithm and store the result RESULT = bin_to_dec(BIN_NUM) # print the solution to the console print(RESULT)
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