prediction, explanation and correct code

Author: mshayriyesaricicek

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

@@ -1,7 +1,7 @@
 // Predict and explain first...
 
 // Why will an error occur when this program runs?
-// =============> write your prediction here
+// =============> decimalNumber is defined within the function so it will not be recognised in console.log(decimalNumber);
 
 // Try playing computer with the example to work out what is going on
 
@@ -14,7 +14,24 @@ function convertToPercentage(decimalNumber) {
 
 console.log(decimalNumber);
 
-// =============> write your explanation here
+// =============>  this is a function to convert a decimal number to a percentage - function declared
+// the decimal number is declared as 0.5  
+// percentage is calculated by multiplying the decimal // number by 100 and then adding the % symbol 
+// the answer returned is named percentage and gives a // number followed by %
+// the answer will be printed in console
 
 // Finally, correct the code to fix the problem
-// =============> write your new code here
+// =============> // the error was actually 'decimalNumber' has already been declared
+// this was because decimalNumber was declared inside the function convertToPercentage(decimalNumber)
+// and declared again within the function with the const statement
+// once const decimalNumber = 0.5; was moved outside the function this error was resolved
+// that way the global decimalNumber exists and the function can still accept it as an argument
+
+
+// const decimalNumber = 0.5;
+// function convertToPercentage(decimalNumber) {
+//   const percentage = `${decimalNumber * 100}%`;
+//   return percentage;
+// }
+// console.log(decimalNumber);
+