Return a function for IF ELSE IF statements

I am trying to run a block of code that is series of IF ELSE IF statements, that checks to see if certain conditions are true.

    if (2 > 1) {
        return true;
    }

    else if (3 > 1) {
        return true;
    }

    else if (4 > 1) {
        return true;
    }

    else {
        alert('Not all conditions are true')
    }

It is working fine, but I want to add a function at the end, if all the conditions are true, In the code below I added the function, but now it seems to run the function without checking all the conditions first

    if (2 > 1) {
        return true;
    }
    else if (3 > 1) {
        return true;
    }
    else if (4 > 1) {
        return true;
    }
    else {
        alert('Not all conditions are true')
    }

    // Run this function after checking all the conditions are true
    allConditionsTrue();

I think I am getting confused with where the function should be placed.

Any help is greatly appreciated :)