Predict, fix, and explain code

Author: russom

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

@@ -3,18 +3,32 @@
 // Why will an error occur when this program runs?
 // =============> write your prediction here
 
+// Prediction:
+// 1. decimalNumber is declared twice and it will give syntax error.
+
 // Try playing computer with the example to work out what is going on
 
-function convertToPercentage(decimalNumber) {
+/*function convertToPercentage(decimalNumber) {
   const decimalNumber = 0.5;
   const percentage = `${decimalNumber * 100}%`;
 
   return percentage;
 }
 
-console.log(decimalNumber);
+console.log(decimalNumber);*/
 
 // =============> write your explanation here
 
+// 2. console.log will return undefined as decimalNumber local scope declaration inside the function.
+// 3. It's percentage not decimalNumber needs printing.
+
 // Finally, correct the code to fix the problem
 // =============> write your new code here
+
+function convertToPercentage(decimalNumber) {
+  return percentage = `${decimalNumber * 100}%`;
+}
+
+console.log(convertToPercentage(0.5));
+
+// The function convertToPercentage can be called passing with an argument of the input.