Answer :

#include<stdio.h> //header file contains the function,decleraction and macro defination of key words used in code.

int main ()

{

int Int;    //adressing the variables

float Float;   //adressing the variables

char Char;   //adressing the variables

printf("%lu\n",sizeof (Int));  //output

printf("%lu\n",sizeof (Float));  //output

printf("%lu\n",sizeof (Char)); //output

}

Output :