Binary to Decimal

I’m sharing a program that converts binary to decimal in python.

# make a new function
def bintodeci(num):
    reverse = len(num) -1
    exp = 0
    total = 0
    # range(start, stop, step)
    for digit in range(reverse, -1, -1):
        total += int(num[digit]) * (2**exp)
        exp += 1
    
    # return the value
    return total


answer = bintodeci("11")
print(answer)

sample output:

bai.