Objective-C: Structures

Structure is a user defined data type which is used to store different type of data together under a unique name.

Declaring Structure   

  • A structure is declared using keyword struct.
    • The variables of structure are declared within curly braces and are called   data members of the structure.
    • A structure is always terminated with a semicolon.
      • A structure can have one or many variable that may be given at the time of declaration or further in the program.
      • The members of structure are accessed via dot operator ‘.’.


  Syntax1: Without declaring variable of structure

 struct structure_name


    data-type var1;

    data-type var2;


    data-type varn;



struct structure_name s1,s2,..;


   Syntax2: Declaring with variables

struct structure_name


    data-type var1;

    data-type var2;


    data-type varn;





  • A structure student is declared with two data members, name and age.
  • Variable of the structure is declared as s.
  • The data members of structure student are initialized using ‘.’ Operator.

Structure within Structure

A structure can also be defined in another structure and is called nesting of structure.



  #import <Foundation/Foundation.h>

 int main (int argc, const char *argv[]){

struct student


    char* name;


   struct marks


    float mark;

    char* subject;





         NSLog(@“Enter Name of the student : ”);


         NSLog(@“Enter Subject : ”);


         NSLog(@“Enter Marks obtained : ”);




   NSLog(@“\tRecord of student”);


         NSLog(@“NAME   :%s”,s.name);


         NSLog(@“Marks  : %f”,s.mrk.mark);


 return 0;



Enter Name of the student: Alice

Enter Subject : Computers

Enter Marks obtained: 86

      Record of student

NAME   : Alice

Subject: Computers

Marks  : 86