excel serial number autofill

How to automatically fill in serial numbers:

1. Select the cell that needs to be filled with the starting serial number;

2. Enter the starting serial number "1 ";

3. Move the mouse to the lower right corner of the cell. When the cursor changes to a cross, hold down the Ctrl key on the keyboard, then hold down the left mouse button and drag downwards. In this way, the serial number will be filled in automatically.

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