<input type="range" ng-init="overral=0" ng-model="overral"/> {{overral}}

 <input ng-model="value1" type="number" ng-init="value1=10" />
 <input ng-model="age1" type="number" ng-init="age1=30" />
 <input ng-model="postal1" type="number" ng-init="postal1=25" />