INTRODUCTION TO ARRAY

WHAT IS ARRAY ?

• An array is a collection of data item of same type.
• Items are stored at contiguous memory location.
• It can also store the collection of derived data types such as pointers, structures etc.
• A one-dimensional array is like a list.
• A two dimensional array is like matrix.
• ARRAY ALWAYS STARTS WITH 0.


NECCESSITY OF ARRAY:

• Organized and readable.
• If you want to store marks of 100 students, creating 100 different variables makes program                   ridiculous or messy : solution creating array of size 100 might efficient.

SYNTAX FOR DECLARING AND INITIALIZING ARRAY

• Datatype name[size];
• Datatype name[size]= {x,y,………};
• Datatype name [rows][columns]; //for 2d array
• Initialize the array one by one by accessing it using its index
o name[0]=2;
o name[1]=4; and so on
where 0,1.... is index number

SOME BASIC EXAMPLES:

To aware about memory allocation and storing data according to index:#include<stdio.h>
void main()
{
   int marks[2]={25,50};   // intitialization               
   printf("marks of student 1 is %d\n",marks[0]);
   printf("marks of student 2 is %d",marks[1]);

}

OUTPUT
marks of student 1 is 25
marks of student 2 is 50

* It is clear that ;  each element of array can be access with index number 

To input the values in array and display them:

#include<stdio.h>
void main()
{
int i,num[5];

//to input

printf("enter the 5 values\n ");
for(i=0;i<5;i++)
{

scanf("%d",&num[i]);

}

// to display
printf("content of array are \n");
for(i=0;i<5;i++)
{

printf("%d",&num[i]);

}

}

OUTPUT
enter the 5 values
1
2
3
4
5
content of array are
1
2
3
4
5




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Milan Tomic

Hi. I’m Designer of Blog Magic. I’m CEO/Founder of ThemeXpose. I’m Creative Art Director, Web Designer, UI/UX Designer, Interaction Designer, Industrial Designer, Web Developer, Business Enthusiast, StartUp Enthusiast, Speaker, Writer and Photographer. Inspired to make things looks better.

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