how to calculate area of shapefile in arcgis

Here we calculate the area of shapefile in arcgis ,shapefile include any area of building ,ground, boundary etc
First, open up an ArcGIS session and load in the polygon data you want to calculate the area on. Make sure your data is in a projection system. Next, select the polygon file that you want to calculate area on and right click. This will open up a menu of options for that layer.