JavaScript

console.log("Hello World");

Numbers

Numbers in JavaScript are IEEE-754 double precision format. http://upload.wikimedia.org/wikipedia/commons/a/a9/IEEE_754_Double_Floating_Point_Format.svg
+/- (2^53 - 1) maximum int value.


            Math.pow(2, 53) === Math.pow(2, 53) + 1; // true

Infinity, -Infinity, NaN, 0, -0.


            0.1 + 0.2 === 0.3; // false