There isn't a single keyboard shortcut specifically for invoking the IF function in Excel. However, several shortcuts can streamline your workflow when building and editing IF functions:

* Navigation:
- Arrow keys: Move around within the formula for precise editing.
- Tab/Enter: Quickly move to the next cell after finalizing your formula.
* Editing:
- F2: Enter editing mode within the current cell, allowing you to directly modify the IF function formula.
* Absolute References:
- F4: This is particularly useful when working with cell references within your IF function. Pressing F4 after entering a cell address locks that reference into the formula (e.g., from A1 to $A$1), ensuring it remains static regardless of where you copy the formula. This is helpful for referencing fixed values or data in another location.
* Applying to Multiple Cells:
- Ctrl+Enter: If you're creating the same IF function for a range of cells, you can enter the formula in one cell, then copy it across. However, for efficiency, you can directly enter the formula into multiple selected cells simultaneously. Simply select the range of cells where you want the IF function applied, then build your formula in the formula bar. Pressing Ctrl+Enter will enter the formula into all selected cells at once.

By using these keyboard shortcuts in conjunction with understanding how to build IF function logic, you can significantly improve your speed and accuracy when working with formulas in Excel.