Fix function definition and undefined variable error

Author: arunkumarakilan

Sprint-2/1-key-errors/2.js

@@ -1,20 +1,40 @@
 
 // Predict and explain first BEFORE you run any code...
 
+// The code has a syntax error because a number is used instead of a parameter name in the function definition.
+// Additionally, num is used inside the function without being declared or passed as an argument, which causes a ReferenceError.
+// If the function is not called, it will not execute.
 // this function should square any number but instead we're going to get an error
 
 // =============> write your prediction of the error here
 
-function square(3) {
+// The code has a syntax error because a number is used instead of a parameter name in the function definition.
+// Additionally, num is used inside the function without being declared or passed as an argument, which causes a ReferenceError.
+// If the function is not called, it will not execute.
+
+function square(num) {
     return num * num;
 }
+let num =  square(3);
+console.log(num);
+
 
 // =============> write the error message here
+// syntax error :unexpected number.
 
 // =============> explain this error message here
+// The error occurs because a number is used in the function definition instead of a parameter name. A function definition must contain a parameter (a variable name), not a value.
+
+// Inside the function, num is used but it was never declared or passed as a parameter, which causes a ReferenceError because num is not defined in the scope.
+
+// Also, if the function is not called, it will not execute.
 
 // Finally, correct the code to fix the problem
 
 // =============> write your new code here
 
+function square(num) {
+    return num * num;
+}
 
+console.log(square(3));