Twofold to decimal in Python: Here, we will figure out how to change over the given paired number to the decimal number without utilizing any library work in Python?

Given a twofold number and we need to change over it into decimal without utilizing library work.

### Example:

```
Input:
1010
Output:
10
```

### Python code to change over twofold to decimal:

```
# Python code to convert binary to decimal
def binToDec(bin_value):
# converting binary to decimal
decimal_value = 0
count = 0
while(bin_value != 0):
digit = bin_value % 10
decimal_value = decimal_value + digit * pow(2, count)
bin_value = bin_value//10
count += 1
# returning the result
return decimal_value
# main code
if __name__ == '__main__':
binary = int(input("Enter a binary value: "))
print("decimal of binary ", binary, " is: ", binToDec(binary))
binary = int(input("Enter another binary value: "))
print("decimal of binary ", binary, " is: ", binToDec(binary))
binary = int(input("Enter another binary value: "))
print("decimal of binary ", binary, " is: ", binToDec(binary))
```

### Output:

```
Enter a binary value: 1010
decimal of binary 1010 is: 10
Enter another binary value: 1111000011
decimal of binary 1111000011 is: 963
Enter another binary value: 10000001
decimal of binary 10000001 is: 129
```