DIGital:

Lesson 1000: Boolean Operators in Truth Table Format

In earlier lessons you learned about the boolean operators. In this lesson, we will present the concept of the boolean operators with truth tables. This, as explained earlier, is an excellent use of truth tables: visualization.

[ and.gif: 1.2K ] [ or.gif: 1.2K ] [ not.gif: 1.0K ] [ xor.gif: 1.3K ]

You can use these truth tables to construct the truth tables for the other boolean opeartors. For example, using the above truth table for AND, we can construct the truth table for NAND by negating the last column, and showing each step in a new column:

[ nand.gif: 1.4K ]



Check your progress

Construct a truth table for ~(A+B) (that's A NOR B). A basic skeleton is constructed for you, just fill in the letters and numbers in the appropriate boxes.

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---+---+-----+--------
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