feat: add number object

Author: ExploitEngineer

part1 (Basics)/9_comments.js renamed to part1 (Basics)/09_comments.js

@@ -0,0 +1,32 @@
+/*
+INFO: JavaScript Number Object
+The Number object is a wrapper object around primitive number values. It provides properties and methods to work with numeric values, such as checking for infinity, NaN, parsing, formatting, and converting between types.
+*/
+
+let numPrimitive = 42; // number literal (primitive)
+let numObject = new Number(42); // Number object (no recommended for most use cases)
+
+// 1. Properties of Number
+Number.EPSILON; // smallest interval between two representable numbers.
+Number.MAX_VALUE; // Largest number possible
+Number.MIN_VALUE; // Smallest number
+Number.MAX_SAFE_INTEGER; // Largest safe integer
+Number.MIN_SAFE_INTEGER; // Smallest safe integer
+Number.NaN; // Special value representing Not-a-Number
+Number.NEGATIVE_INFINITY; // represents negative infinity
+Number.POSITIVE_INFINITY; // represents positive infinity
+
+// 2. Methods of Number
+Number.isFinite(10); // true
+Number.isInteger(10.5); // true
+Number.isNaN(NaN); // true
+Number.isSafeInteger(9999999999); // false
+Number.parseInt("42px"); // 42
+Number.parseFloat("3.14abc"); // 3.14
+
+// 3. Instance Methods (on number values) -- this () behaves like new Number(3.14159)
+(3.14159).toFixed(2); // "3.14"
+(12345).toExponential(2); // "1.23e+4"
+(99.99).toPrecision(3); // "100"
+(255).toString(16); // "ff"
+new Number(100).valueOf(); // 100