Is there a way that I can print the intermediate result on a console or some log file in order to debug my contract?

up vote 8 down vote accepted

you could use events to debug(log) the desired variable.Please read the official documentation to get more details.

e.g :

 pragma solidity ^0.4.0;

    contract test {
        event test_value(uint256 indexed value1);
        uint256 value_test;

        function test_f()  {

            //value_test processing
            test_value(value_test); // log the current value
        }
    }

an alternative solution is to use the remix (browser solidity) debugger : enter image description here

enter image description here

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