A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Can you give your real-world use case? I've never tried what you are asking, but I suspect there are easier ways to accomplish your goal.
You don't have to enter {1,2,3,4} as an array formula for Excel to view it as an array [try using =Count({1,2,3,4}) in a cell to verify, it should return a value of 4 without being entered with Ctrl/Shift/Enter].