Question

Write a JavaScript script that has subprograms nested three deep and in which each nested subprogram references variables defined in all of its enclosing subprograms

Answer 1

Here is the program that can help you:

<script>
function ParentFunction() {
    var parentX = 5;
    console.log(parentX);
    function subChild1() {
        var subChild1Y = parentX + 15;
        console.log(subChild1Y);
        function subChild2() {
            var subChild2Z = (subChild1Y + parentX) * 2;                    
            console.log(subChild2Z);
            function finalSubChild() {
                var final = parentX + subChild1Y + subChild2Z; 
                console.log(final);
                alert('Alert From Deepest Nested Function\nParentX = '+ parentX +'\nsubChildY = '+ subChild1Y +'\nsubChildZ = '+ subChild2Z +'\nadded together = '+final);
    }
    finalSubChild();
    }
    subChild2();
    }
    subChild1();
    }ParentFunction();

</script>

Few screenshots that can help you even better:

I hope this will help you. Do upvote if it helps you. Thanks.