Excel is absolutely a programming language
No as it is not a compiled language, just an interpreted one …VBA runs fast.
Excel is an application - it is not any sort of language.
The underlying programming language that was used to build it and other Office applications is C++. If you want to programme using Excel, then you need to employ VBA (Visual Basic for Applications).
A spreadsheet is an interactive computer application for organization, analysis and storage of data in tabular form.[1][2][3] Spreadsheets are developed as computerized simulations of paper accounting worksheets.[4] The program operates on data entered in cells of a table. Each cell may contain either numeric or text data, or the results of formulas that automatically calculate and display a value based on the contents of other cells. A spreadsheet may also refer to one such electronic document.
No need even any program, just an Asperger autistic brain !any other programs that are as fast and as simple in adding numbers?