Could somebody explain why the following functions give different results. The first does not seem to work, but the second does. I'm puzzled because I thought +=1 and ++ did the same thing.

(I'm not intending to actually use this code, it's just to demonstrate the difference).

/*function 1*/

function incrementIfZero1(base,element) {



    if (element == 0) {

        return base++;

    }

    else

    {

        return base;

    }

};





/*function 2*/

function incrementIfZero2(base,element) {



    if (element == 0) {

        return base+=1;

    }

    else

    {

        return base;

    }

};



incrementIfZero1(1,0) /* -> 1*/

incrementIfZero2(1,0) /* -> 2*/

Any help is very much appreciated.

Thanks,

Robin

[Edit:]

Thank you for your replies, it makes sense now. I had also tried the following statement, which resulted in the same thing as function 1:

return (base++)

I'm now surprised that this doesn't give the same result as function 2 - I would have expected the brackets to 'force' it to be evaluated before returning. Any idea why this is not the case?