# Boolean operator

A Boolean operator is a word used to connect two or more keywords or phrases together in a search. The three most common Boolean operators are AND, OR, and NOT.

AND: The AND operator means that all of the keywords or phrases connected by the operator must be present in the search results. For example, if you search for "red AND green AND blue," all of the results will include the word "red," the word "green," and the word "blue."

OR: The OR operator means that either of the keywords or phrases connected by the operator may be present in the search results. For example, if you search for "red OR green OR blue," the results will include any pages that include the word "red," the word "green," or the word "blue."

NOT: The NOT operator means that the keyword or phrase connected by the operator must not be present in the search results. For example, if you search for "red NOT green NOT blue," the results will exclude any pages that include the word "red," the word "green," or the word "blue."

##### What are the 3 Boolean operations?

The 3 Boolean operations are:

1. AND - This operation will return results that contain all of the keywords that are being searched for.

2. OR - This operation will return results that contain at least one of the keywords that are being searched for.

3. NOT - This operation will return results that do not contain the keyword that is being searched for.

### What are 5 common Boolean searches?

1. "AND" searches: These Boolean searches will return results that include all of the keywords that are specified. For example, a search for "cats AND dogs" will return results that include both "cats" and "dogs".

2. "OR" searches: These Boolean searches will return results that include at least one of the keywords that are specified. For example, a search for "cats OR dogs" will return results that include either "cats" or "dogs" (or both).

3. "NOT" searches: These Boolean searches will return results that do not include the keyword that is specified. For example, a search for "cats NOT dogs" will return results that include "cats" but not "dogs".

4. " NEAR" searches: These Boolean searches will return results that include the keywords that are specified and that are close to each other. For example, a search for "cats NEAR dogs" will return results that include both "cats" and "dogs" and that have those keywords close to each other.

5. "PHRASE" searches: These Boolean searches will return results that include the exact phrase that is specified. For example, a search for "cats dogs" will return results that include the exact phrase "cats dogs" (and not just results that include both "cats" and "dogs").

#### Why is it called a Boolean operator?

As Boolean operators are used in search engines to combine keywords and produce more relevant results, they are sometimes also referred to as "search engine operators".

Boolean operators are named after George Boole, who invented Boolean algebra, a system of mathematical logic, in the mid-19th century. Boolean algebra was later used by Claude Shannon in the design of digital circuits.

##### What is Boolean example?

In computer science, a Boolean is a logical data type that can have only two possible values, usually denoted as true or false.

Boolean values are often used in conditional statements, such as if-then-else and switch-case. In programming languages such as C, C++, and Java, the data type of a Boolean value is typically denoted as bool.

### What is a Boolean search examples?

Boolean search is a type of search that allows users to combine keywords with operators (or, and, not) to narrow or broaden the scope of their search. For example, a Boolean search for "SEO" could return results that include the keyword "SEO" as well as the terms "search engine optimization" and "search engine optimizer."

Categories SEO