hacktoberfest2018/Roman Conversion In Python/Roman.py at ded3c973f0caff593a6f97b202ab2944577e1572 · ambujraj/hacktoberfest2018 · GitHub

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# Python program to convert Roman Numerals
# to Numbers

# This function returns value of each Roman symbol
def value(r):
    if (r == 'I'):
        return 1
    if (r == 'V'):
        return 5
    if (r == 'X'):
        return 50
    if (r == 'C'):
        return 100
    if (r == 'D'):
        return 500
    if (r == 'M'):
        return 1000
    return -1

def romanToDecimal(str):
    res = 0
    i = 0

    while (i < len(str)):

        # Getting value of symbol s[i]
        s1 = value(str[i])

        if (i+1 < len(str)):

            # Getting value of symbol s[i+1]
            s2 = value(str[i+1])

            # Comparing both values
            if (s1 >= s2):

                # Value of current symbol is greater
                # or equal to the next symbol
                res = res + s1
                i = i + 1
            else:

                # Value of current symbol is greater
                # or equal to the next symbol
                res = res + s2 - s1
                i = i + 2
        else:
            res = res + s1
            i = i + 1

    return res

# Driver code
a=input("Enter Roman Number:")
print("Integer form of Roman Numeral is"),
print(romanToDecimal(a))

print("test")