using ng-checked="expression" will never update the respective ng-model value.

[pankajparkar]

I'm adding description so that everyone know that updating ng-checked for checked will never update the binding between ng-model variable.

Plunkr
http://plnkr.co/edit/vdVMmhe0rY1aGzX4koyM?p=preview

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[Narretz]

I don't understand what you mean. ngChecked will only set the checked attribute, it does not work together with ngModel in any way. Is that what you are trying to say? I#m particularly confused about the ng-changed part of the sentence.

[pankajparkar]

@Narretz Ya, that's exactly i wanted to say..ng-checked with expression only set its checked attribute, it never update respective ng-model variable.

[googlebot]

CLAs look good, thanks!