Explaining the error, prediction, and fix

Author: abmhts

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

@@ -1,20 +1,30 @@
 // Predict and explain first...
 
 // Why will an error occur when this program runs?
+  //- variable name "decimalNumber" declared twice in the same function. one as function parameter and again as a const in the same function.
 // =============> write your prediction here
-
+  //- SyntaxError because "decimalNumber" declared twice. 
 // Try playing computer with the example to work out what is going on
 
-function convertToPercentage(decimalNumber) {
-  const decimalNumber = 0.5;
-  const percentage = `${decimalNumber * 100}%`;
+// function convertToPercentage(decimalNumber) {
+//   const decimalNumber= 0.5;
+//   const percentage = `${decimalNumber * 100}%`;
 
-  return percentage;
-}
+//   return percentage;
+// }
 
-console.log(decimalNumber);
+// console.log(decimalNumber);
 
 // =============> write your explanation here
-
+  //- "decimalNumber" is already provided as a parameter to the function, but I don't need a parameter because I'm creating the value "0.5" inside the function. So I removed the parameter. I also need to call the function with convertToPercentage() instead of console.log(decimalNumber) because "decimalNumber" only exists inside the function.
 // Finally, correct the code to fix the problem
 // =============> write your new code here
+
+function convertToPercentage() {
+  const decimalNumber = 0.5;
+  const percentage = `${decimalNumber * 100}%`;
+
+  return percentage;
+}
+
+console.log(convertToPercentage());