def decToBin(input):
    global bin
    bin = ""
    while input >= 1:
        bdigit = str(input % 2) #binary digit
        input = input/2 #divides input by 2
        bin = bin + bdigit # concatenates 1 or 0 to full binary digit
    return int(bin[::-1]) #reverses string

def binToDec(input):
    input = str(input)
    input = input[::-1]
    z = 1 #number to multiply by
    for i in input:



choice = ""
while choice != "q":
    if choice == "dec":
        a = input("Decimal number: ")
        print decToBin(a)
    if choice == "bin":
        a = input("Binary digit: ")
        print binToDec(a)
    if choice == "q":
        break
    choice = raw_input("dec, bin, or q: ")