Describe explicit conversion briefly.

Explicit type conversion is a type conversion which is explicitly defined within a program (instead of being done by a compiler for implicit type conversion).

double da = 3.3;

double db = 3.3;

double dc = 3.4;

int result = (int)da + (int)db + (int)dc; //result == 9

//if implicit conversion would be used (as if result = da + db + dc), result would be equal to 10

There are several kinds of explicit conversion.

Checked:

Before the conversion is performed, a runtime check is done to see if the destination type can hold the source value. If not, an error condition is raised.

Unchecked:

No check is performed. If the destination type cannot hold the source value, the result is undefined.