Boolean Operators by l030RMO

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```									Boolean Operators?

WHAT IN THE
WORLD?
The Web is HUGE!!

 Over the years, it has become increasingly difficult to
find things on the web since the number of websites
increases exponentially.
Search Engines

 Search engines allow you to look for information
based on KEY WORDS you would provide.
Hits

 Every time someone goes to a Web Page, it is called
a HIT
Queries

 A Query is like a question. It is a method of filtering
data.
Boolean Logic

 Search engines use Boolean Logic

 Nineteenth century mathematician George Boole,
invented Boolean logic
Boolean Operators

 Boolean operators are based on a simple yes or no
ranking system

 The primary boolean operators are:
AND
OR
NOT
But What Do They Do?

 AND
 The AND operator instructs the Search Engine to search for all
documents containing all words you specify
 NOT
 Sometimes it’s easier to narrow a search by specifying what
you are NOT looking for
 Symbols
 Some search engines use the “+” sign as the operator, which
works the same way as the AND operator
Process

 Searching is a process of trial and error

 The first page of documents/sites should have
what you are looking for

 Re-define your search or go to a different search
engine if you are not finding your data
Time

 It’s better to spend a little time narrowing down
your search than following every result you get
Case Sensitivity

 Most search engines do not require key operators in
all caps
Pre-set Operators & Quotation Marks

 Pre-set Operators
 Some search engines such as “Google” have boolean operators
already setup

 It’s a good idea to put quotation marks around groups
of words you want to appear together ie “Pentium 4”

 Doing this will limit your search, instead of getting
anything with Pentium and anything with a 4 your
would get sites with just the words Pentium 4
…the end

 Can you find the end of the internet using Boolean
Operators?
Boolean Operators?

WHAT IN THE
WORLD?

```
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