Truth table with don't care values

A truth table with 0s and 1s only, is called a binary truth table.
What is a truth table with 0s, 1s, and don't care values allowed?

Also, please suggest a good graphical representation for truth tables with don't care values.

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A don't care value is often represented by an x. Just use your standard binary truth table and replace the 0 or 1 with an x if the value for x in the row does not affect the outcome.

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dshrenikAuthor Commented:
I'm planning to use green tick marks and red Xs for 1s and 0s.
Can you suggest a different representation for don't care?
>Can you suggest a different representation for don't care?
How about a black dot? As good as any..
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Using the more common notations, in general, is better if sufficient for your needs. Then, it is easier for the intended audience to more quickly interpret your presentation.
If you are using a green check mark and a red x, I would use a yellow - since the - is often used to mean n/a or neutral and yellow is well known as being between red and green (from traffic lights).
Also the dash is commonly used to mean unknown.
This type of table is called a "ternary truth table".
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