Returning data from $.post() [duplicate]

This question already has an answer here:

• How do I return the response from an asynchronous call? 15 answers

I have this function:

    function getNamep(id_user) {
    $.post('php/back.php', {
        id: id_user,
        f: "getName"
    }, function (data) {
        data = jQuery.parseJSON(data);
        if (data[0] == 1) {
            console.log(data)
        }
        else {
            console.log(data)
        }
    });
}

I want to get the result here:

var name = getNamep(2);

How i can do this? Returning data from $.post()

Thanks!