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Stevie Fortune
2,677 PointsCan't get else clause to test if two variables are false
I can't get the final else clause to test whether or not both variables are false in the code challenge... any explanation would be great please..
var isAdmin = false;
var isStudent = false;
if ( isAdmin ) {
alert('Welcome administrator');
} else if (isStudent) {
alert('Welcome student');
} else (isAdmin=== false && isStudent=== false) {
alert ('Who are you?');
}
<!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>
4 Answers
andren
28,558 PointsElse statements does not take conditions of any kind, they are automatically executed if the if/else if statements above them are not executed. That is what differentiates an else statement and an else if statement.
You could fix this by changing the final else to an else if statement (you can have as many else if statements under an if statement as you want). But you could also just remove the conditions entirely, and that is what the task wants in this case. If the first if statement does not run and the else if does not as well then both isAdmin and isStudent has to be false, therefore you don't need to check for that in the last statement in this case.
Ronald Kendla
1,875 PointsYou should not write a condition in the else clause. General definition of JavaScript "if/else" statement is: if (condition) { do something } else if (condition) { do something } else { do something }
Stevie Fortune
2,677 PointsThanks Ronald, the actual question is "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?""
This to me reads as though there needs to be a condition (In my code is, "isAdmin=== false && isStudent=== false") in the else clause to run the alert. (alert ('Who are you?');)
I know that I am incorrect, but am I in the ball park?
Ronald Kendla
1,875 PointsOh, I see where this might have confused you Stevie.
"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?"" "This to me reads as though there needs to be a condition (In my code is, "isAdmin=== false && isStudent=== false") in the else clause to run the alert. (alert ('Who are you?');)"
Think of it this way: if the first "if" statement does not run, that means automatically that isAdmin===false. If the "if else" condition does not run, that means automatically that isStudent===false, because neither of them are true. Thus you don't need to specifically add a condition which checks if both of them are false.
Stevie Fortune
2,677 PointsAh ha, now I understand! Thank you both for your help. Compared to HTML and CSS, I'm struggling a bit getting my head around this JS stuff... I'll get there eventually.. Thanks again guys.