C Programming Code Examples C > Beginners Lab Assignments Code Examples C Program to Find the Size of a Union C Program to Find the Size of a Union - Define the union. - Finds its size using keyword sizeof(). - Print the same and exit. #include <stdio.h> void main() { union sample { int m; float n; char ch; }; union sample u; printf("The size of union = %d\n", sizeof(u)); /* initialization */ u.m = 25; printf("%d %f %c\n", u.m, u.n, u.ch); u.n = 0.2; printf("%d %f %c\n", u.m, u.n, u.ch); u.ch = 'p'; printf("%d %f %c\n", u.m, u.n, u.ch); } - Define the union named sample. - Declare three variables m, n and ch of different data types. - Use the keyword sizeof() to find the size of a union and print the same. - Initialize each variable with some value and print its value as output. - Exit.
