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konstans@stuy.edu all > binaryToDecimal
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Given a binary number in a string formatted like "1001", return a string that represents the number in decimal. "101" in binary is "5" in decimal.


binaryToDecimal('0') → '0'
binaryToDecimal('1') → '1'
binaryToDecimal('10') → '2'

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def binaryToDecimal(b):

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