Arrays in C allow storing multiple values of the same data type in a single variable. An array is declared with the data type, array name, and size. Elements in an array are accessed using indexes that run from 0 to size-1. Multidimensional arrays can also be declared to store arrays of arrays.

1. *Array in C Language

2. *Introducing Arrays.
Declaration of a Array. Variables, Creating
Arrays.
The Length of Arrays.
Initializing Arrays.
Multidimensional Arrays.

3. *
Array is a data structure that represents a
collection of the same types of data.
int num[10];
Num reference
An Array of 10 Elements
of type int.
num [0]
num[1]
num[2]
num [3]
num[4]
num[5]
num[6]
num[7]
num[8]
num[9]

4. *
Data type array name[index];
Example:
int list[10];
char num[15];
float hat[20];

5. *
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.

6. *
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.

7. *
Declaring, creating, initializing in one
step:
int my Array[5] = {1, 2, 3, 4, 5};
int studentAge[4];
studentAge[0] = 14;
studentAge[1] = 13;
studentAge[2] = 15;
studentAge[3] = 16;

8. *
int matrix[10] [10];
for (i=0; i<10; i++)
for (j=0; j<10; j++)
{
matrix[i] [j] = i * j;
}
float mat[5] [5];

9. *
0 1 2 3 4
0
1
2
3
4
0 1 2 3 4
0
1
2 7
3
4
int matrix[5]
[5];
matrix[2] [1] =
7
0 1 2
0 1 2 3
1 4 5 6
2 7 8 9
3 10 11 12
int[][] array
={
{1, 2, 3},
{4, 5, 6},
{7, 8, 9},
{10, 11, 12}};

10. *
To declare, create and initialize a
multidimensional array.
For example,
int[][] array = {
{1, 2, 3},
{4, 5, 6},
{7, 8, 9},
{10, 11, 12}
};
This is equivalent to the following statements:
array[0][0] = 1; array[0][1] = 2; array[0][2] = 3;
array[1][0] = 4; array[1][1] = 5; array[1][2] = 6;
array[2][0] = 7; array[2][1] = 8; array[2][2] = 9;
array[3][0] = 10; array[3][1] = 11; array[3][2] = 12;