printf("%d, %d, %d", sizeof(3.0f), sizeof('3'), sizeof(3.0)); 
The sizeof function returns the size of the given expression. 
sizeof(3.0f) is a floating point constant. The size of float is 4 bytes 
sizeof('3') It converts '3' in to ASCII value.. The size of int is 2 bytes 
sizeof(3.0) is a double constant. The size of double is 8 bytes 
Hence the output of the program is 4,2,8 
Note: The above program may produce different output in other platform due to the platform dependency of C compiler. 
In Turbo C, 4 2 8. But in GCC, the output will be 4 4 8.   |