add Sum_of_Digits_of_a_Number

Author: james5635

Logic Building/Sum of Digits of a Number/1.py

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+"""Iterative Approach"""
+
+
+def sum_of_digits(n: int) -> int:
+    """
+    >>> sum_of_digits(12345)
+    15
+    >>> sum_of_digits(0)
+    0
+    >>> sum_of_digits(9999)
+    36
+    """
+    sum = 0
+    while n != 0:
+        last = n % 10
+        sum += last
+        n //= 10
+    return sum
+
+
+if __name__ == "__main__":
+    from doctest import testmod
+
+    testmod(verbose=True)

Logic Building/Sum of Digits of a Number/2.py

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+"""Recursive Approach"""
+
+
+def sum_of_digits(n: int) -> int:
+    """
+    >>> sum_of_digits(12345)
+    15
+    >>> sum_of_digits(0)
+    0
+    >>> sum_of_digits(9999)
+    36
+    """
+    if n == 0:
+        return 0
+    return n % 10 + sum_of_digits(n // 10)
+
+
+if __name__ == "__main__":
+    from doctest import testmod
+
+    testmod(verbose=True)

Logic Building/Sum of Digits of a Number/3.py

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+"""Taking Input Number as String"""
+
+
+def sum_of_digits(s: str) -> int:
+    """
+    >>> sum_of_digits("12345")
+    15
+    >>> sum_of_digits("0")
+    0
+    >>> sum_of_digits("9999")
+    36
+    >>> sum_of_digits("1234567890")
+    45
+    >>> sum_of_digits("123456789123456789123422")
+    104
+    """
+    sum: int = 0
+    for i in range(len(s)):
+        digit: int = ord(s[i]) - ord("0")
+        sum += digit
+    return sum
+
+
+if __name__ == "__main__":
+    from doctest import testmod
+
+    testmod(verbose=True)

Logic Building/Sum of Digits of a Number/README.md

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+## Sum_of_Digits_of_a_Number Mehod
+- Iterative Approach
+- Recursive Approach
+- Taking Input Number as String