1 + 1 = 2 -1 + 1 = 0 +1 + 1 = 2 4 * 4 = 16 -4 * -4 = 4 * 4 (1/3) * 3 = 1 3 / 1.5 = 2 3 mod 2 = 1 1 or 0 not (1 and 0) not 0 4.0 round 0; 4 ceil 4; 4 floor 4; 4 4.5 round 0; 5 4.2 round 0; 4 -4.2 round 0; -4 -4.5 round 0; -5 -2.0 round 0; -2 ceil -3; -3 floor -6.0; -6 ceil 4.2; 5 ceil -4.5; -4 floor -4.5; -5 4 < 5 -5 < 2 -2 <= -2 abs(-2); 2 4 > 3 4 > -3 5 >= 2 2 >= 2 1 != 2 not (1 != 1) 1e4 = 10000 1e-2 = 0.01 ln(exp(1));1 trunc(4.5);4 trunc(-4.5);-4