Question

I am trying to convert a Python program into C#. I do not understand what is being done here.

def mrF(alg, times = 1):
    if ((times % 2) == 0):
        return alg
    else:
        if (alg == 'R'):
            return "L'"
        if (alg[0] == 'G'):
            return alg
        if (alg[-1] == "'"):
            return alg[:-1]
        elif (alg[-1] == '2'):
            return alg
        else:
            return (alg + "'")

Is alg a string or a string array or a list?

Answer 1

Its a string. You can use a subscript operator on strings in Python, which I assume is the only part in your code, that made you to post it as question.

>>> "rohit"[0]
'r'
>>> "rohit"[-1]
't'
>>> "rohit"[0:2]
'ro'

Its similar to the way you access indices in lists.