ShowCellLabel

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`ShowCellLabel`

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is an option for Cell that specifies whether to display the label for a cell.

Details

ShowCellLabel can take the values True or False to show or hide the cell label.
ShowCellLabel->Automatic works identically to ShowCellLabel->True if the cell had been last evaluated in a currently running kernel session. If the kernel session that last evaluated the cell is no longer running, then Automatic changes the display by obscuring $Line and changing the onscreen style used to display the label.
ShowCellLabel is more often set for styles of cells than for individual cells.
If the CellLabelAutoDelete option is set to True or Automatic, the label for a cell is automatically deleted when the cell is modified.

Examples

Basic Examples (1)Summary of the most common use cases

Create one input cell with ShowCellLabel->True and one with ShowCellLabel->False:

In[1]:=1

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https://wolfram.com/xid/0dqtp7r28wm-ccln7b

Labels are set when the cells are evaluated, but the second input cell's label is hidden:

In[2]:=2

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https://wolfram.com/xid/0dqtp7r28wm-e18i0t

You can see the label by turning ShowCellLabel on again:

In[3]:=3

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https://wolfram.com/xid/0dqtp7r28wm-bkgpkj

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