Untitled

What does the end part of this declaration do?
result = condition ? value_if_true : value_if_false;

if(condition == true) {

    result = value_if_true;

} else {

    result = value_if_false;

}

result = myVariable ? value if true : value if false;

result = myFunction() ? value if true : value if false;

result = (myVariable > 10) ? value if true : value if false;

condition_check ? result if true : result if false

var u;
if(document.getElementById('myaccount').className.match(/loggedin/)) {
    u = true;
} else {
    u = false;
}
return u;

<condition> ? <return if condition is true> : <return if condition is false>

var u;
if (document.getElementById('myaccount').className.match(/loggedin/)){
   u = 'true';
} else {
   u = 'false';
}