JavaScript If ...... else Statements

Syntax for IF Statement 

<script type="text/javascript">
<!--
var result= 20;
if( result> 18 ){
   document.write("<b>Result is greater than 18</b>");
}
//-->
</script>

Syntax for IF Else Statement 

<script type="text/javascript">
var result= 20;
if( result> 18 ){
   document.write("<b>Result is greater than 18</b>");
}

else 

{ 

   document.write("<b>Result is less than 18</b>");
} 
</script>

Syntax for IF...Else..IF Statement 

<script type="text/javascript">
var result= 20;
if( result> 18 ){
   document.write("<b>Result is greater than 18</b>");
} 

else if(result==18)

{ 

  document.write("<b>Result is equal to 18</b>"); 

} 

else

{

  document.write("<b>Result is less than 18</b>");

} 
</script>