Cellm's =PROMPT() function outputs the AI response to a range of text, similar to how Excel's =SUM() function that outputs the sum of a range of numbers.

For example, you can write =PROMPT(A1, "Extract all person names mentioned in the text.") in a cell's formula and drag the cell to apply the prompt to many rows. Cellm is useful when you want to use AI for repetitive tasks that would normally require copy-pasting data in and out of a chat window many times.