Suppose z is an integer while z and y are long variables. If you write z = z + y; in your C program, which of the following will happen?

Compiler will generate error

z will be converted to long and z will be calculated as long

y will be converted to int and z will be calculated as int

z will be converted to long and z will be calculated as int

In z = z + y;, since z is an int and y is long, y is converted to int (if possible) to match the type of z due to usual type conversion rules.

The result is calculated as an int, and this may cause data loss if y exceeds int range.