Update 4.js

Fix invalid variable names by renaming to start with letters instead of numbers.

Author: HoussamLh

Sprint-1/2-mandatory-errors/4.js

@@ -1,2 +1,14 @@
-const 12HourClockTime = "20:53";
-const 24hourClockTime = "08:53";
+// Original variable names are invalid because variable names cannot start with a number
+// const 12HourClockTime = "20:53"; //  This will cause a syntax error
+// const 24hourClockTime = "08:53"; //  Also invalid for the same reason
+
+// Fix:
+// Variable names must start with a letter, underscore (_), or dollar sign ($).
+// So we rename the variables to valid names below:
+
+const hour12ClockTime = "20:53";  // Valid variable name for 12-hour clock time
+const hour24ClockTime = "08:53";  // Valid variable name for 24-hour clock time
+
+// Explanation:
+// Variable names cannot begin with a number in JavaScript,
+// so prefixing them with a letter or underscore solves the problem.