# Python Math: Convert a binary number to decimal number

## Python Math: Exercise-31 with Solution

Write a Python program to convert a decimal number to a binary number.

**Sample Solution**:-

**Python Code:**

```
b_num = list(input("Input a binary number: "))
value = 0
for i in range(len(b_num)):
digit = b_num.pop()
if digit == '1':
value = value + pow(2, i)
print("The decimal value of the number is", value)
```

Sample Output:

Input a binary number: 1000001 The decimal value of the number is 65

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