Operators

To do something with your data you need operators.

Arithmetic operations

For math operations there are +, -, *, / and %, which are addition, subtraction, multiplication, division and the modulo operation.

You can combine them, and they will follow normal math rules.

int a = 5;
int b = 2;
int c = 4;
// result is 13
int result = a + b * c;

Also brackets are allowed:

int a = 5;
int b = 2;
int c = 4;
// result is 28
int result = (a + b) * c;

The modulo operation returns the remainder of a division:

// result is 1
int result = 5 % 2

Also useful

• Very often a value needs to be added to a variable and then again written back to it:

  int s = 2;
  s = s + 2;
  // s is 4
  

  This can be also written as:

  int s = 2;
  s += 2;
  

  It works also with the other operators (-=, /=, *=, %=).

• Also you will often add only 1 to a variable. This can be simplified to:

  int s = 2;
  s++;
  // s is 3
  

  The same works with subtraction (--).