Exercise31.py

def convertIntToStr(integerNum: int) -> str:
    """
    Convert Integer Number to String

    :param integerNum: Number in integer
    :type integerNum: int
    :raise TypeError: If integerNum is not an int
    :return: str
    :rtype: str
    """
    if integerNum == 0:
        return "0"

    DIGITS_INT_TO_STR = {
        0: "0",
        1: "1",
        2: "2",
        3: "3",
        4: "4",
        5: "5",
        6: "6",
        7: "7",
        8: "8",
        9: "9",
    }

    if integerNum < 0:
        isNegative = True
        integerNum = -integerNum
    else:
        isNegative = False

    stringNum = ""

    while integerNum > 0:
        onesPlaceDigit = integerNum % 10
        stringNum = DIGITS_INT_TO_STR[onesPlaceDigit] + stringNum
        integerNum //= 10

    if isNegative:
        return "-" + stringNum
    else:
        return stringNum

    ...


for i in range(-10000, 10000):
    assert convertIntToStr(i) == str(i)