feat: add assignment operators

Author: ExploitEngineer

part1 (Basics)/16_assignment.js

@@ -0,0 +1,41 @@
+// Assignment Operators in JavaScript
+
+/*
+=     Simple assignment
++=    Add and assign
+-=    Subtract and assign
+*=    Multiply and assign
+/=    Divide and assign
+%=    Modulus and assign
+**=   Exponentiation and assign
+*/
+
+// Simple assignment (=)
+// Assigns the value on the right to the variable.
+let x = 5;
+console.log(x); // Output: 5
+
+// Add and assign (+=)
+// Adds right value to left variable and assigns the result.
+x += 3; // equivalent to x = x + 3
+console.log(x); // Output: 8
+
+// Subtract and assign (-=)
+x -= 2; // equivalent to x = x - 2
+console.log(x); // Output: 6
+
+// Multiply and assign (*=)
+x *= 4; // equivalent to x = x * 4
+console.log(x); // Output: 24
+
+// Divide and assign (/=)
+x /= 3; // equivalent to x = x / 3
+console.log(x); // Output: 8
+
+// Modulus and assign (%=)
+x %= 5; // equivalent to x = x % 5
+console.log(x); // Output: 3
+
+// Exponentiation and assign (**=)
+x **= 3; // equivalent to x = x ** 3
+console.log(x); // Output: 27