Arrays

Array:

An array is a collection of similar data items, that are stored under a common name.

It is denoted by index or subscript enclosed in square brackets, i.e. [].

Array value is starting with 0.

Types of arrays:

• Single dimensional arrays
• Multidimensional arrays

1. Single dimensional arrays:

The collection of items can be stored under a one variable name using only one subscript, such a variable is called ‘one dimensional array or single dimensional array’.

Array declaration of syntax:

 Data_type array_variable [Size of the array];

Example:

int a[5]={5,10,2,1,4};

Explanation:

Example program single dimensional array:

#include<stdio.h>

#include<conio.h>

void main()

{

  int  a[3];

  clrscr();

  printf("Enter two data for addition\n");

  scanf("%d %d",&a[0],&a[1]);

  a[2]=a[0]+a[1];

  printf("Result is : %d",a[2]);

  getch();

}

Output:

2. Multidimensional arrays:

Multidimensional arrays are used in a situation where a table of value needs to be stored in an array.

Array declaration of syntax:

 Data_type array_variable [row size][column size];

Example:

int a[3][3];

Explanation:

Example program multidimensional array:

#include<stdio.h>

#include<conio.h>

void main()

{

int std[2][1];

int i;

clrscr();

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

{

          printf("\n Enter %d student roll number and mark: ",i);

          scanf("%d %d",&std[i][0],&std[i][1]);

}

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

{

       printf("\n  %d Student roll number %d and mark %d  ",i,std[i][0],std[i][1]);

}

getch();

}

Output:

Explanation:

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