I am a beginner in web programming using openlayers 3 and I wish you help me :s In my project i want to add a button to zoom in the map by clicking or selectionning a part in the map using openlayers3. Please help mee :s

I am a beginner in web programming using OpenLayers 3.

In my project i want to add a button to zoom in the map by clicking or selecting a part in the map using OpenLayers 3.