Excel_Out is a standalone, portable Ada package for writing Excel spreadsheets with basic formattings and formulas, easily and programmatically.

• Enables the automatic production of reports
• Fast: 50 sheets per second, with 10,000 data cells each on a slow 1.66 GHz computer
• No interaction needed with Excel or MS Office
• Unconditionally portable (*)
• Endian-neutral
• Object oriented
• Task safe
• Pure Ada 95 (nothing compiler/system specific), can be used in projects in Ada 95, Ada 2005, Ada 2012 and later versions of the language
• Floating-point hardware neutral: no IEEE hardware required
• Tests and demos included
• Includes a CSV parser with related tools.
• Free, open-source

The creation of an Excel file is as simple as this small procedure:

with Excel_Out;

procedure Small_Demo is
  xl : Excel_Out.Excel_Out_File;
begin
  xl.Create ("small.xls");
  xl.Put_Line ("This is a small demo for Excel_Out");
  for row in 3 .. 8 loop
    for column in 1 .. 8 loop
      xl.Write (row, column, row * 1000 + column);
    end loop;
  end loop;
  xl.Close;
end Small_Demo;

(*) within limits of compiler’s provided integer types and target architecture capacity.