fix duplicate declaration and print call in sprint 3 key error 1

Author: Vaidah-dev

Sprint-3/1-key-errors/1.js

@@ -1,20 +1,22 @@
 // Predict and explain first...
 
-// Why will an error occur when this program runs?
-// =============> write your prediction here
-
+// Why will an error occur when this program runs
+    // When this program runs there will be an identifier SyntaxError because 'decimalNumber' has already been declared
+    // Also the output will print a decimal since it says console.log(decimalNumber);
 // Try playing computer with the example to work out what is going on
 
 function convertToPercentage(decimalNumber) {
-  const decimalNumber = 0.5;
   const percentage = `${decimalNumber * 100}%`;
 
   return percentage;
 }
 
-console.log(decimalNumber);
+console.log(convertToPercentage(0.5));
 
-// =============> write your explanation here
+// 'decimalNumber' is already declared in two different areas in the same function which JavaScript does not allow.
+// 'decimalNumber' is only useful inside the function, so it will give an error of not knowing what decimalNumber is,
+//  even if it succeeds it will give the wrong output since what we are looking for is the percentage.
 
 // Finally, correct the code to fix the problem
-// =============> write your new code here
+//  New code: 1. Removed the duplicate `const decimalNumber = 0.5;` line.
+// 2. Changed the console.log to call the function and print the result.