Simple presentation about linear search.

1. Linear Search
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Submitted by:
Markajul Hasnain Alif
ID: 161-35-139

2. Contents
Definitions (Data, Structure, Data Structure, Search, Linear
search)
Example
Pseudocode
Advantages and disadvantages
Discussion
And Sources
Linear Search
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3. What is data?
Data is a collection of facts, such as numbers, words,
measurements, observations or even just descriptions
of things.
Linear Search
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4. What is
structure?
The arrangement of and relations between the parts or
elements of something complex.
Linear Search
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5. What is data
structure?
data structure is a specialized format for organizing
and storing data.
Linear Search
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6. What is search?
Search is the process of looking for something.
Linear Search
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7. What is linear
search?
linear search or sequential search is a method for
finding a target value within a list. It sequentially checks
each element of the list for the target value until a
match is found or until all the elements have been
searched.
Linear Search
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8. Linear search
example
If you are asked to find the name of the person having
phone number say “1234” with the help of a telephone
directory.
Since telephone directory is sorted by name not by
numbers,we have to go through each and every
number of the directory
Linear Search
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9. Pseudocode
For all elements
Check if it is equal to element being searched
for.
If it is, return its position.
else continue.
Linear Search
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10. Example
Linear Search
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11. Advantages
⦿ If the first number in the directory is the number you were
searching for ,then lucky you!!.
⦿ Since you have found it on the very first page,now its not
important for you that how many pages are there in the
directory.
⦿ Whether if it is of 1000 pages or 2000 pages it will take u
same time to find you the number ,if it is at the very
beginning .
.
Linear Search
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12. Disadvantages
⦿ It may happen that the number you are searching for is the
last number of directory or if it is not in the directory at all.
⦿ In that case you have to search the whole directory.
⦿ Now number of elements will matter to you.if there are 500
pages ,you have to search 500;if it has 1000 you have to
search 1000.
Linear Search
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13. Discussion
⦿ Sorted array is not needed.
⦿ Works fine for small number of elements .Search
time increases with number of elements.
⦿ Elements with higher probability of being searched
should be kept in the beginning.
Linear Search
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14. Sources
Google.com
Wikipedia.org
Slideshare.net
www.cse.ust.hk
hellohasan.com
Linear Search
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15. Thank you all.
Linear Search
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