Redeclare JavaScript Variable

Question

In the following code:

var greeting = \"hi\";

function changeGreeting() {
    if (greeting == \"hi\") {
        var greeting = \"hello\";
    }

    alert(g         


        

Answer 1

In your first code snippet, you're checking global variable, which doesn't exist -> doesn't pass if condition.

Check out this on javascript scopes and how to work with variables Javascript garden - function scopes