Arithmetics

ArithmeticExpression ::=  
    Expression "+" Expression | 
    Expression "-" Expression | 
    Expression "/" Expression | 
    Expression "*" Expression | 
    Expression MOD Expression | 
    "-"  Expression

There are very few things to say about RainCode's arithmetic operators, except that:

• MOD can only be applied when both operands are integers
• For all other operators, any mix of integer and real operands can be used.