To calculate the number of days between two dates using the DATEDIF function in Google Sheets, follow these steps:
Open your Google Sheets document.
Select an empty cell where you want the result to appear.
Type the following formula:
=DATEDIF(start_date, end_date, "D")
Replace "start_date" with the cell reference or value representing the starting date and "end_date" with the cell reference or value representing the ending date. Make sure to enclose the dates in quotation marks if you are using date values directly in the formula.
Press Enter to get the number of days between the two dates.