feat: add operatorPrecedence.js

Author: ExploitEngineer

part1 (Basics)/08_opePre.js

@@ -0,0 +1,36 @@
+// operatorPrecedence.js
+
+// INFO: Operator Precedence in JavaScript
+
+/*
+Operator precedence determines the order in which parts of an expression are evaluated.
+
+Expressions with multiple operators are evaluated based on this precedence,
+not just from left to right.
+
+To avoid confusion and bugs, use parentheses () to explicitly specify the order.
+
+---
+
+Example 1: Without parentheses (can be confusing)
+let score = 2 * 3 + 2 - 1;
+// Evaluated as: (2 * 3) + 2 - 1 = 6 + 2 - 1 = 7
+
+---
+
+Example 2: With parentheses (clear and recommended)
+let score1 = ((2 * (3 + 2)) - 1);
+// Evaluated as: 2 * (5) - 1 = 10 - 1 = 9
+
+---
+
+Console outputs:
+*/
+
+let score = 2 * 3 + 2 - 1;
+let score1 = ((2 * (3 + 2)) - 1);
+
+console.log(score);  // Output: 7
+console.log(score1); // Output: 9
+
+// TIP: Use parentheses to make your code easier to read and avoid unexpected results.