How to make equalization in ng-if? ( AngularJS )

Question

I have ng-if problem. I want something similar to the php syntax in AngularJS. Example:

<?php 
$A = "Data";
if ( $A == "Data" ) {
$B = "ImData"; 
}
else{
$B = "ImNotData";
}
?>

How to make this syntax in AngularJS ng-if directive?

This does not work:

ng-if="A == 'Data' B='ImData'" 

Answer 1

suppose you have isTrue Boolean variable in controller

In controller:

$scope.isTrue = true;

In View:

<span ng-if="isTrue == "true">TRUE VALUE</span>
<span ng-if="isTrue != "true">OTHER VALUE</span>