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a28ad3f759
* Added excel column title to number algorithm as part of conversions * Renamed file to better reflect algorithm function * Removed duplicate file * Update excel_title_to_column.py * Update excel_title_to_column.py Co-authored-by: John Law <johnlaw.po@gmail.com>
34 lines
711 B
Python
34 lines
711 B
Python
def excel_title_to_column(column_title: str) -> int:
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"""
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Given a string column_title that represents
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the column title in an Excel sheet, return
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its corresponding column number.
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>>> excel_title_to_column("A")
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1
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>>> excel_title_to_column("B")
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2
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>>> excel_title_to_column("AB")
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28
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>>> excel_title_to_column("Z")
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26
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"""
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assert column_title.isupper()
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answer = 0
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index = len(column_title) - 1
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power = 0
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while index >= 0:
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value = (ord(column_title[index]) - 64) * pow(26, power)
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answer += value
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power += 1
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index -= 1
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return answer
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if __name__ == "__main__":
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from doctest import testmod
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testmod()
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