remove 2nd declaration of parameter

Author: remimarcelle

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

@@ -2,19 +2,36 @@
 
 // Why will an error occur when this program runs?
 // =============> write your prediction here
+// I predict that there will be two errors in this code.
+// The first error will be that the const decimalNumber  
+// has already been declared in the function parameter,
+// it cannot be declared twice, which will cause an error because
+// it is not allowed to redeclare a variable with the same name.
+// The 2nd error is that console.log(decimalNumber) is trying
+// to log a variable that is outside the function, which will cause
+// an error because it is not defined.
 
 // 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;
+  return percentage; 
 }
 
-console.log(decimalNumber);
+console.log(convertToPercentage(0.1)); // This will log "10%"
+// console.log(decimalNumber); // This will cause an error because decimalNumber is not defined outside the function 
+
 
 // =============> write your explanation here
+// decimalNumber is already a parameter so it can't be declared again
+// with const inside the function. Also, variables declared inside a
+// function are not accessible outside the function (scope), so 
+// console.log(decimalNumber) out the function would fail.
+// the fix is to remove the const declaration and to log the percentage
+// instead of decimalNumber, which is the variable that holds the result
+// of the calculation (convertToPercentage(0.5)).
 
 // Finally, correct the code to fix the problem
+
+
 // =============> write your new code here