1.1

Author: Christelle-b

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

@@ -1,20 +1,30 @@
 // Predict and explain first...
 
 // Why will an error occur when this program runs?
-// =============> write your prediction here
+// Here the name decimalNumber in 'const decimalNumber' has already been used, so we will get a synthax Error for that line. 
 
 // 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);
-
-// =============> write your explanation here
+// console.log(decimalNumber);
 
+// JavaScript is read from top to bottom, so when the processor reads an error, the program will stop running and will get the error message.
+//The first error is on line 9 with the reuse of the variable declaration name of 'decimalNumber.
+//The second error is on line 15 where we are trying to call the variable 'decimalNumber',which is a local variable inside the function. We cannot access this variable outside of the function. We will need to call the whole function.
 // Finally, correct the code to fix the problem
 // =============> write your new code here
+function convertToPercentage(decimalNumber) {
+  const percentage = `${(decimalNumber * 100).toFixed(2)}`;
+  return percentage;
+}
+
+
+console.log(convertToPercentage(0.5));   
+console.log(convertToPercentage(0.1234)); 
+console.log(convertToPercentage(1));