How do I define a structure in C?

What is Structure: The structure is a user-defined data type that allows storing multiple types of data in a single unit. It occupies the sum of the memory of all members.

• The structure member can be accessed only through the structure variable. 
• Structure variables accessing the same structure but the memory allocated for each variable will be different.

Defining a Structure: The Struct keyword is used to define a structure.

Syntax of Structure: 

Struct Structure_name 
{ 
mebmer_variable1; 
mebmer_variable2; 
mebmer_variable3; 
. 
. 
. 
. 
member_variable n; 
}[structure variables]; 

        

  Let's see a simple example: 

#include<stdio.h> 
Struct students 
{ 
   char name[50];  // Structure members declaration. 
   int age; 
}S1; // declaring structure variable of student. 
int main() 
{ 
  printf("Enter the name of the student:\n"); 
  scanf("%s",S1.name); 
  printf("Enter the age of the student:\n"); 
  scanf("%d",S1.age); 
  printf("Name and age of the student: %s,%d,S1.name,S1.age"); 
  return 0; 
} 

     The output of the following code is:

       

                   Enter the name of the student: Shubham 

                    Enter the age of the student:  23

                    Name and age of the student: Shubham,23