These operators perform simple mathematical operations on their arguments.
+ gives the sum of the two arguments.
- gives the difference between the first and second arguments.
* gives the product of the two arguments.
/ gives the first argument divided by the second argument.
% gives the modulus of the first argument by the second, that is, the remainder of the integer division of the first argument by the second.
Gamma> 5 + 6;
11
Gamma> 12 / 5;
2.3999999999999999112
Gamma> div(12,5);
2
Gamma> 19 % 5;
4
Gamma>