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JavaScript JavaScript Basics (Retired) Making Decisions with Conditional Statements Using Comparison Operators

Kevin Jervis
Kevin Jervis
2,600 Points
Posted by Kevin Jervis
Kevin Jervis
2,600 Points

Conditional Statements

I suspect that I have made a mistake on line 2. If someone can point me in the right direction that would be awesome.

script.js 
var a = 10;
if (var a > 10 ){
alert("<p>a is greater than b</p>");
} else {
  alert("<p>a is not greater than b</p>)";
        }
var b = 20;
var c = 30;
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>

6 Answers

Charles Wanjohi
Charles Wanjohi
9,235 Points
Charles Wanjohi
Charles Wanjohi
9,235 Points

Remove the var inside the if statement.It should be:

if(a>10){

}

you arent supposed to redeclare variable a in the if condition

Mehak Bhola
Mehak Bhola
262 Points
Mehak Bhola
Mehak Bhola
262 Points

and let me correct my self that the var is already declared not initialized .so no need to do it again and well you can declare it later at any level or at any line. it is not necessary to do that in the beginning but keep in mind tht it should be declared only once . :-) . i m new at tree house n its gd to get your reply Kevin :-)

Kevin Jervis
Kevin Jervis
2,600 Points
Kevin Jervis
Kevin Jervis
2,600 Points

Thanks for the quick response guys. OK so just tried this and getting an error: "Did you use the > symbol to test if a is greater than b?"

var a = 10; if (a>10){ alert("a is greater than b"); } else{ alert("a is not greater than b"); } var b = 20; var c = 30;

Charles Wanjohi
Charles Wanjohi
9,235 Points
Charles Wanjohi
Charles Wanjohi
9,235 Points

You need to compare the two variables .Replace 10 with b 

var a=10;
var b=20;
if(a>b){
}
Kevin Jervis
Kevin Jervis
2,600 Points
Kevin Jervis
Kevin Jervis
2,600 Points

Oh Snap! Got it. Thanks Charles I appreciate the help :o)

Mehak Bhola
Mehak Bhola
262 Points
Mehak Bhola
Mehak Bhola
262 Points

ya becz the variable is already initialized so there is no need go reinitialized it .

Kevin Jervis
Kevin Jervis
2,600 Points
Kevin Jervis
Kevin Jervis
2,600 Points

That's awesome. Thanks Mehak

Mehak Bhola
Mehak Bhola
262 Points
Mehak Bhola
Mehak Bhola
262 Points

you are welcome kevin