Plzz explain data type and sizeof operator in C[solved]

Question

Data type and sizeof operator

Answer 1

Sizeof() operator returns amount of memory occupied by the variable.
And data types (before variable name) are used to indicates what type of information that variable is going to hold.

Answer 2

Sizeof() operator returns the amount of memory the variable or data type passed to it.

Answer 3

https://www.tutorialspoint.com/sizeof-operator-in-c
Have a look