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JavaScript JavaScript Basics (Retired) Making Decisions with Conditional Statements Add a Final Else Clause

Posted by Daniel Jaquez
Daniel Jaquez
2,430 Points

i need help withConditional statement question challenge please

Add a final else clause to this conditional statement so that if the isAdmin variable and isStudent variables are both false an alert opens with the message "Who are you?"

script.js 
var isAdmin = false;
var isStudent = false;

if ( isAdmin ) {
    alert('Welcome administrator');
} else if (isStudent) {
    alert('Welcome student');
}
else (false){
    alert("Who are you?");
}
index.html 
<!DOCTYPE HTML>
<html>
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  <title>JavaScript Basics</title>
</head>
<body>
<script src="script.js"></script>
</body>
</html>

3 Answers

Karan Nahar
Karan Nahar
16,157 Points

You did good. But look at your else statement. else does not take a argument. Here only if statement tests for a condition and if it is false else block runs.

var isAdmin = false;
var isStudent = false;

if ( isAdmin ) {
    alert('Welcome administrator');
} else if (isStudent) {
    alert('Welcome student');
} else {
    alert('Who are you?');
}

If both isAdmin and isStudent are false we receive an alert Who are you?

Daniel Jaquez
Daniel Jaquez
2,430 Points

Awesome thank you so much i was struggling to understand but this puts it in perspective

Sean T. Unwin
Sean T. Unwin
28,690 Points
Sean T. Unwin
Sean T. Unwin
28,690 Points

Remove the (false) from the final else statement. There is no bracketing for an else clause.

Johannes Scribante
Johannes Scribante
19,175 Points
Johannes Scribante
Johannes Scribante
19,175 Points

Hi Daniel,

An if statement can be used in three ways:

  1. as a if on its own 

    if (true) {
alert('condition is true' );
}

  2. as an if with an else

    var condition = false
if (condition) {
alert('condition is true' );
} else {
alert('condition is false' );
}

    in this case if the first condition in the first if statement is not met the block of code after the else will be executed not matter what the condition is, as long as it is not true.

  3. as an if with an else if and an else

    var condition = 3
if (condition === 1) {
alert('condition is 1' );
} else if (condition === 2) {
alert('condition is 2' );
} else {
alert('condition is neither 1 or 2' );
}

    Hopefully you can follow the trend, so basically this is very similar to the second version, however is neither the first or the second conditions are met the final else block of code will be executed. Based on these you will also notice that the final else does not take a condition to test for, as if the conditions (see the if there lol) are not met prior to the else the else will be executed.

Hope this helps

Daniel Jaquez
Daniel Jaquez
2,430 Points

Thanks, Jonathan that helps a lot