To count the number of non-empty cells in the range A1:E1 using the COUNT function, you can enter the following formula in cell F1:
=COUNT(A1:E1)
This will count all the cells in the range A1 to E1 that contain numeric values. If you want to count all non-empty cells regardless of their content (including text), you would use the COUNTA function instead:
=COUNTA(A1:E1)
Choose the function that best fits your needs based on what you want to count.