Fix variable redeclaration and update function call

Author: arunkumarakilan

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

@@ -1,20 +1,40 @@
 // Predict and explain first...
-
+// syntax error identifier decimalNumber be already declare
+// there is no function call and then you can't use the local variable decimalNumber out of the function
 // Why will an error occur when this program runs?
+//decimalNumber is already declared as a parameter, so declaring it again inside the function causes an error.
+
+//There is no function call.
+
+//You cannot use the local variable decimalNumber outside the function scope.
 // =============> write your prediction here
 
 // Try playing computer with the example to work out what is going on
 
 function convertToPercentage(decimalNumber) {
-  const decimalNumber = 0.5;
+  decimalNumber = 0.5;
   const percentage = `${decimalNumber * 100}%`;
 
   return percentage;
 }
-
-console.log(decimalNumber);
+console.log(convertToPercentage());
 
 // =============> write your explanation here
+//The error occurred because a local variable was redeclared inside the function using a variable keyword. Since the parameter already acts as a local variable, redeclaring it caused an error.
+
+//To fix this, I removed the variable keyword and modified the existing parameter instead.
+
+//I also removed the unused variable from console.log because it was outside the function scope.
 
+//Finally, I called the function directly inside console.log using convertToPercentage() so the function executes properly and returns the correct value.
 // Finally, correct the code to fix the problem
 // =============> write your new code here
+function convertToPercentage(decimalNumber) {
+  
+  const percentage = `${decimalNumber * 100}%`;
+
+  return percentage;
+}
+
+const decimalNumber = convertToPercentage(0.5) ;
+console.log(decimalNumber);