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Python Program to Convert Binary Number to Decimal


A binary number is a number expressed in the base-2 numeral system or binary numeral system, which uses only two symbols 0 and 1.

The decimal numeral system is the standard system for denoting integer and non-integer numbers.

In this blog, we will create python programs for converting a binary number into decimal.

Pythonic way to convert binary into decimal


Enter a binary number, make it as a list and make the value of decimal number equals zero.

binary = list(input("please enter a binary number: "))
d_num = 0


  • Use a for loop to iterate over the length of our list .

  • Use the pop() method that returns the item present at the given index. This item is also removed from the list and assign its value to the digit variable.

  • Use the if statement to check whether the digit equals one or not . If it is true , the d_num will equal to the sum of itself and two raised to the i power .

for i in range(len(binary)):
    digit = binary.pop()
    if digit == '1':
        d_num = d_num + pow(2,i)
print("The Decimal Number is ", d_num)

Finally, This is an example of the results

please enter a binary number: 111000
The Decimal Number is  56


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