The `NOW` function in Excel is used to return the current date and time based on the system clock. Here’s how you can use it:
Basic Usage
- Enter the Function:
- Simply select a cell where you want the current date and time to appear.
- Type `=NOW()` and press Enter.
- Note:
- The `NOW` function does not take any arguments, so the parentheses are empty.
- The value returned by the function updates every time Excel recalculates. This means if you modify any cell or manually recalculate your workbook (by pressing `F9`), the value will update to the current date and time.
Formatting the Output
- The default format usually displays both the date and the time. To change how the result is displayed:
1. Right-click the cell containing the `NOW` function.
2. Select Format Cells.
3. In the Format Cells dialog box, go to the Number tab.
4. Choose Custom and enter a format that suits your needs, such as:
Uses of the NOW Function
- Time Stamps: Automatically input the current date and time in progress or log sheets.
- Calculations: Calculate elapsed time or days by using the `NOW` function in combination with other functions.
- Updating Reports: Ensures that the data is always current upon opening the file or recalculating it.
Precautions
- Since `NOW` updates with every recalculation, be careful when using it in situations where you need a fixed timestamp. In such cases, consider using `Ctrl + ;` and `Ctrl + Shift + ;` to enter a static date and time, respectively.
By following these steps, you can effectively use the `NOW` function to manage date and time data dynamically within your Excel sheets.
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