The subtraction operator (-) is used in the form
operand1 - operand2
The subtraction operator calculates the difference of two numbers.
The following are some examples of using the subtraction operator:
b1 = 17 is ok, because 17 is in the range -128 and 127
byte b1 = 5; b1 = 190 - 173; // Ok.
i - 27 is of the type int. int to byte assignment is not allowed
int i = 100; byte b1 = 5; b1 = i - 27; // An error.
You can add cast to fix the error.
double d1 = 15.45; byte b1 = (byte)(d1 -27); // OK