sizeof operator in C

C Program To Find the Size of Data Types using sizeof operator

#include<stdio.h>
void main()
{
  printf("\n size of int is: %d",sizeof(int));
  printf("\n size of float is: %d",sizeof(float));
  printf("\n size of double is: %d",sizeof(double));
  printf("\n size of char is: %d",sizeof(char));
}

Program can also be written using sizeof operator with variables as given below.

#include<stdio.h>
void main()
{
  int i;
  float j;
  double k;
  char l;
  printf("\n size of int variable is: %d",sizeof(i));
  printf("\n size of float variable is: %d",sizeof(j));
  printf("\n size of double variable is: %d",sizeof(k));
  printf("\n size of char variable is: %d",sizeof(l));
}
 


Output: ( using GNU GCC Compiler with Code Blocks IDE )
Note: In borland C or Turbo C compilers size of int is 2.