ng-show, ng-hide
HTML
<div ng-app>
<div ng-controller="showCrtl">
<form>
<label ng-hide="editMode" >Rashmi</label>
<input ng-show="editMode" ng-keypress="changemode() " >
<span class="pull-right" >
<button ng-click="editMode=true" class="btn-lg btn-warning" >edit </button> </span>
</form>
</div>
</div>
JavaScript
function showCrtl($scope){
$scope.changemode=function(){
$scope.editMode = false;
}
}