Day 22: Binary-Decimal

def menu_select(num):
    if(num == 1):
        binary = input("Enter binary number: ")
        decimal = binary_to_decimal(binary)
        return(decimal)

    elif(num == 2):
        decimal = input("Enter decimal number: ")
        binary = decimal_to_binary(decimal)
        return(binary)


def binary_to_decimal(num):
    b = list(num)
    n = len(list(num))
    decimal = 0
    hold = 0
    i = 0
    exp = n-1
    while (i < n):
        x = int(b[i])
        quot= 2**exp
        hold = x*quot
        i += 1
        exp -= 1
        decimal = decimal + hold
    return(decimal)

def decimal_to_binary(num):
    quot = int(num)
    base = 0
    counter = 0
    binary=[]
    while (quot > 0):
        rem = quot%2
        binary.append(str(rem))
        quot = quot//2
        counter +=1

    binary.reverse()
    return(int(''.join(binary)))

print("Day 22: Binary-Decimal Converter\n")
print("What type do you want to convert? : \n")
print("1- Binary\n")
print("2- Decimal\n")

choice = input("Select: ")
s = menu_select(int(choice))
print("Result : ", s)