inyecciones.html

<div ng-app="app" ng-controller="controller">
 <p>
   Default Value: {{value}}
 </p>
 <p>
   is {{number}} Even Number? {{result}}
 </p>
 <p>
   {{sum}} {{pi}}
 </p>
</div>

inyecciones.js

var app = angular.module('app',[]);

app.constant('PI',3.1416);

app.config(function($provide){
	$provide.provider('otherService',function(PI){
  	this.$get = function(){
    	var factory = {};
      
      factory.add = function(a,b){
      	return a + b;
      }
      
      factory.PI = PI;
      
      return factory;
    }
  })
});

app.value('defaultValue',100);

app.factory('mathFactory',function(){
	var factory = {};
  
  factory.mod = function(a,b){
  	return a % b;
  }
  
  return factory;
});

app.service('calcService',function(mathFactory){
  this.isEven = function(a){
  	return mathFactory.mod(a,2) === 0;
  }
});

app.controller('controller',function($scope,defaultValue,calcService,otherService){
	$scope.value = defaultValue;
  $scope.number = 14;
  $scope.result = calcService.isEven($scope.number);
  $scope.sum = otherService.add(1,2);
  $scope.pi = otherService.PI
});