C - ARRAYS

 ARRAYS:

It is collection of similar data type data. There are two types of array –

1.   Single Dimensional Array

2.   Multi Dimensional Array

 1. Single Dimensional Array –

Values are arranged in the form of columns.

SYNTAX-

Data type array name [size];

int a [5];

In this data type is integer and name of array is num and can store 3 elements of integer type.

Array work on the basis of index value. Its index value always starts with 0. So, when we work on array then we take one less than total size of array.

EXAMPLE-

/* Example of Single Dimensional Array */

main()

{

int num[3],i,sum=0;

for (i=0;i<3;i++)

{

printf (“Enter number “);

scanf(“%d”, &num [i]);

}

for (i=0;i<3;i++)

{

sum+= num[i];

}

printf(“sum is “, sum);

getch();

}

Output-

Enter Number 2

Enter Number 43

Enter Number 13

Sum is 58

 

2. Multi Dimensional Array –

In multi dimensional array data is stored in rows and columns.

SYNTAX-

Data type array name [rows] [columns];

int num [3] [3];

In that array number of rows re 3 and columns are 3.

EXAMPLE-

/* Example of multi Dimensional Array */

main()

{

int num[3][2],i,j;

for (i=0;i<3;i++)

{

for (j=0;j<2;j++)

{

printf (“Enter number “);

scanf(“%d”, &num [ i ][ j ]);

}

}

for (i=0;i<3;i++)

{

for (j=0;j<2;j++)

{

printf (“%d\t“,num [ i ][ j ] );

}

printf (“\n”);

}

getch();

}

Output-

Enter number 1

Enter number 2

Enter Number 3

Enter number 4

Enter number 5

Enter number 6

1          2

3          4

5          6