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bin2dec – Binary to decimal

Write a program that converts binary numbers to decimal.

Input will consist of several lines each with a binary number b of up to 30 bits (binary digits).

For each line of input, output should contain a line with the decimal representation of the corresponding input number.

Example Input

1
10
11
10010
1000

Example Output

1
2
3
18
8

Scoring

Submit your solution to be graded according to the following list:

Hints

Remember the characters '0' and '1' are different than the numeric values 0 and 1. You can create a function which converts between both by using an if or case expression.

try first: digit-palindrome

try also: dec2bin

try next: hex2dec

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