# Difference between revisions of "Boolean operators"

This is a basic concept in computer science

In computer science, the Boolean data type is a data type, having two values (usually denoted true and false), intended to represent the truth values of logic and Boolean algebra. It is named after George Boole, who first defined an algebraic system of logic in the mid 19th century. The Boolean data type is primarily associated with conditional statements, which allow different actions and change control flow depending on whether a programmer-specified Boolean condition evaluates to true or false. It is a special case of a more general logical data type; logic does not always have to be Boolean.[1]

## Boolean operators

Boolean operator Definition Example
AND The result is TRUE ( 1 ) if both inputs are TRUE ( 1 ).
OR The result is TRUE ( 1 ) if either input is TRUE ( 1 )
NOT Also named an inverter. Inverts the result so TRUE ( 1 ) becomes FALSE ( 0 ) and FALSE ( 0 ) becomes TRUE ( 1 ).
NAND is a logic gate which produces an output which is false only if all its inputs are true; thus its output is complement to that of an AND gate
NOR a Boolean operator which gives the value one if and only if all operands have a value of zero and otherwise has a value of zero.
XOR Also named a "Exclusive OR". The result is TRUE ( 1 ) if either input is TRUE ( 1 ) but not if both inputs are TRUE ( 1 ).

This is one of the better videos I've seen on boolean. Content gratefully used with permission : [2]

## A helpful android app

This app is a good tool to practice your boolean logic! Thank you to Max N. for the suggestion!

## Boolean Logic and Logic Gates

From crash course computer science comes this EXCELLENT video teaching us about boolean logic and logic gates[3]

## Standards

• Define the Boolean operators: AND, OR, NOT, NAND, NOR and XOR.
• Construct truth tables using the above operators.
• Construct a logic diagram using AND, OR, NOT, NAND, NOR and XOR gates.

## References

Give the precise meaning of a word, phrase, concept or physical quantity.

Develop information in a diagrammatic or logical form.