feat: add arithmetic operators

Author: ExploitEngineer

part1 (Basics)/04_arithmetic.js

@@ -0,0 +1,48 @@
+// Arithmetic Operators in JavaScript
+
+/*
++   Addition
+-   Subtraction
+*   Multiplication
+/   Division
+%   Modulus (Remainder)
+**  Exponentiation
+++  Increment
+--  Decrement
+*/
+
+// Addition
+// Adds two numbers.
+console.log(5 + 3); // Output: 8
+
+// Subtraction
+// Subtracts second number from the first.
+console.log(5 - 3); // Output: 2
+
+// Multiplication
+// Multiplies two numbers.
+console.log(5 * 3); // Output: 15
+
+// Division
+// Divides first number by the second.
+console.log(10 / 2); // Output: 5
+
+// Modulus
+// Returns the remainder after division.
+console.log(10 % 3); // Output: 1
+
+// Exponentiation
+// Raises the first number to the power of the second.
+console.log(2 ** 3); // Output: 8
+
+// Increment
+// Increases a number by 1.
+let a = 5;
+a++;
+console.log(a); // Output: 6
+
+// Decrement
+// Decreases a number by 1.
+let b = 5;
+b--;
+console.log(b); // Output: 4