// vec4 is a primitive type @(1,2,3,4) => vec4 a; // declare another @(5,6,7,8) => vec4 b; // add them a + b => vec4 sum; // difference a - b => vec4 diff; // cross product (ignores w component) a * b => vec4 c; // print sum! <<< "sum:", sum >>>; // print difference <<< "diff:", diff >>>; // print cross product <<< "cross product:", c >>>; // array [ a, b, c ] @=> vec4 group[]; // print them <<< group[0], group[1], group[2] >>>;