Deletion operation in array with example

1. Deletion Operation in Array(DS)
Prof. Neeraj Bhargava
Kapil Chauhan
Department of Computer Science
School of Engineering & Systems Sciences
MDS University, Ajmer

2. Deletion Operation in Array
 It is a process of deleting a particular element from an array.
 If an element to be deleted ith location then all elements from
the (i+1)th location we have to be shifted one step towards left.
 So (i+1)th element is copied to ith location and (i+2)th to (i+1)th
location and so on.

3. Algorithm For Deletion Operation in Array
 Deletion in the operation in which a value is deleted
at a particular place in an array.

4. Cont..
In the below diagram , we have deleted E element form the array and rewrite
New array.

5. Algorithm For Deletion In An Array
 Algorithm: In this algorithm a value is being deleted
from ith location of an array Reg[N].
 Let us assume that last element in the array is at Mth
position.
Steps
1. Back=i
2. While (Back<M) repeat 3 and 4
3. Reg[Back]= Reg[Back+1]
4. Back= Back+1
5. M=M-1
6. End

6. Example

7. Explaination
 Steps
1. Back=i => Back=5
2. While(Back<M) repeat step 3 to 4
=> 5<8 true
3. Reg[Back]=Reg[Back+1]
Reg[5]=>Reg[6]=> reg[5]=20
4. Back=Back+1
Now Back =6
again step 3.
Reg[6]=Reg[6=1]
= 28
step 4: Back=Back+1 =>7
again step 3 until Back<M
5. M=M-1
=8-1=>7
6. End.

8. Assignment
 Explain insertion of element of specific position in
array. Discuss all the steps of algorithm with an
example.