Class Libraries & REST APIs for the developers to manipulate & process Files from Word, Excel, PowerPoint, Visio, PDF, CAD & several other categories in Web, Desktop or Mobile apps. Develop & deploy on Windows, Linux, MacOS & Android platforms.... Value = 2 ; sheet1 . Cells [ 0 , 2 ]. Value = 3 ; sheet1...Value = 2.1 ; sheet2 . Cells [ 0 , 4 ]. Value = 2.2 ; sheet2...