First C Program, size of Integer in C

First Program of C #include <stdio.h> int main() {     // Write C code here     printf("Hello world");          return 0; }  OUTPUT Hello world  2) Write a program to find the size of integer datatype #include<stdio.h> int main() { int x; printf("value of int = %d ",sizeof (x)); return 0; }  OUTPUT value of int = 4