ppt for seminar in college level topic

1. Sardar Vallabhbhai Patel
institute of technology
Name - Nariya Priyank
ID -16BEMEF011
Enrollment no. -160410119047
Subject -CPU
Topic -Concept of Array, One dimension
array and two dimension array
Branch -Mechanical-1
Batch -A

2. Introductions of array
-An array
 A single name for a collection of data values
 All of the same data type
 Subscript notation to identify one of the values
 The array is important concept and helps the
programmer in managing many variable of the
same type

3. Arrays can be divided into three
category
 1. Single Dimensional Array
 2. Two dimensional Array
 3. Multi dimensional Array
Some example where the concept of an
array can be used
List of product and their cost sold by a store
Test score of a class of a student
Table of a daily rainfall data
List of the costumer and their telephone data

4. Single Dimensional Array
Dimensional refers to the array’s size , which is how
big the array is.
A single or one dimensional array declaration has
the following form,
datatype arrayname[size];
Here, datatype defines the type of array elements,
it can be int, char, float, long int etc.
The arrayname is the name of variable which
represents the array, while size which is represents
in the [ ] symbol represents the size of the array.

5. Creating Arrays
 Data type array-name[size];
Example:
int num[10];
num[0]references the first element in the array.
num[9]references the last element in the array.
Graphically, array a can be represented like this.
Array elements
Index 0 1 2 3 4 5 6 7 8 9
12 45 34 2 33 65 76 8 6 67

6. Declaring Array Variables
 Data type array name[index];
Example:
int list[10];
char num[15];
float hat[20];

7. The Length of Arrays
 Once an array is created, its size is fixed. It
cannot be changed.
For Example,
int arr[10];
You can not insert any number to arr[11]
location because it is not initialized.

8. Two dimensional
 This type of array represents and store data in
matrix form
 The syntax for two dimensional array is :
datatype variablename [rowsize][columnsize]
 Where ,variablename represent the name of an
array ,rowsize indicate the number of rows in
table ,columnsize indicates number of columns
in an array .

9.  For example
Int sales[3][12];
Here , the row size is 3, so row number spans from 0 to
2,while column number spans from 0 to 11
Column
row 0 1 2 3 4 5 6 7 8 9 10 11
0
1
2
50 23 7 11 23 48 52 69 54 42 88 99
25 23 26 49 50 41 20 56 17 15 23 62
23 15 42 52 69 87 86 95 58 56 96 36

10. Example of Two dimension Array

11. Thank you