Skip to main content

ARRAY---

DEF:-


  • Array is a linear collection of similar elements
  • Array is also known as subscript value
  • Array is a group of value
  • when there is a lot of data then array is required
  • Array are the derived data types in c language which can store the primitive data types of type int, float, char etc.
  • in array each element have index, through index each element can be accessed randomly.

Advantage of Array:--
  1. Code Optimization:- less code to access the data
  2. Ease of traversing:- by using loop we can traverse the element of array
  3. Ease of sorting:- to sort the array only few codes are written
  4. randomly access:- any element access randomly
Disadvantage of Array:-
  1. Fixed size:- the size of array is defined when we declared an array, which cannot be change.Array in c are not dynamically like linked list etc.
Declaration of Array:-
  • An Array can be declared such as we declare the function , only difference is ,In function argument is passed but in array size is declared
  • [] brackets are used to define the size of array
  • index no. is start from 0
Syntax:--data_types  array_name[size of array]; // 1-D Array

example:--   int a[7];  //array a of type int is declared having size 7 and also have a value
                   a[0]=11;  // 11 is insert at index no. 0

Note:-  an Array is initialize when it is declared 

  • int a[7]={11,22,33,44,55,66,77};
  • int a[]={11,22,33,44,55,66,77}; // without giving size
1-Dimensional Array(Default Array) :-
Example:-

2-Dimensional Array:- 2 d array having rows and column, i.e[][] two square brackets having used.
first one for rows and second one for column in each rows
Syntax:--  int arr[4][3]={{1,2,3},{4,5,6},{7,8,9},{10,11,12}};
Explanation:--  here from diagram clearly seen how 2 d array takes memory , 
to access any element bu using index no. is a[1][2]=5;
Example:-

IF YOU LIKE THIS POST SHARE WITH YOUR FRIENDS::::::

Comments

Post a Comment

Popular Posts

CALL BY VALUE AND REFERENCE--

A function can be called by two types 1) Call By Value:-   when an original value is not modified , is known as call by value. In call by value the actual parameter(the parameter passed to function) is copied into the formal parameter(parameter receive by function). in this the value of each variable in calling function is copied into the corresponding dummy variable of the called function. the changes made to the dummy variable have no effect on the actual variable. Example:-   2)Call By Reference:-   when an original value is modified, is known as call by reference.in this a reference is used , denoted by &(symbol). we can use either pointer or reference for call by reference in this the address of the variable is passed into the function called by actual parameter. in this the memory allocation is same for both actual and formal arguments. Example:-   
Post a Comment
Read more

Type casting

type casting or type conversion  allows us to convert one data types into another.for type casting cast operator is required. Syntax:--      (type)expression or value; Example:       int f =9/4; //without type casting       o/p=2       float f=(float)9/4;  //with type casting       o/p=2.3 Type conversion are of two types: 1)Implicit Type Conversion:-  it is also known as automatic type conversion.When the type conversion is performed automatically by the compiler,such type of conversion is known as implicit type conversion. 2)Explicit Type Conversion:-  the type conversion performed by the programmer is known as explicit type conversion.which is done by cast operator as above mentioned.
Post a Comment
Read more

UNION

Definition:-                 Union is similar to structure, except it allows you to define the variable that share storage spaces.Defining a means creating a new data types. How use union:-                       when we create a structure by using struct keyword, now making a union we just replace the keyword struct with the keyword union , other syntax will be same. Difference  between Structure  and Union:- the only difference between them is in memory. NOTE:-  union is used for low level programming but structure mostly used for high level programming. Program to access union:- """SHARE IT WITH YOUR FRIENDS IF HE DID NOT KNOW""""
Post a Comment
Read more