key errors 1js

Author: mandipsanger

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

@@ -1,20 +1,27 @@
 // Predict and explain first...
 
 // Why will an error occur when this program runs?
-// =============> write your prediction here
-
+// =============> write your prediction here decimalNumber has already been declared in the function. const can not redeclare a variable with the same name in the same scope. parameter, so we cannot declare it again with const.
+// This will cause a syntax error. To fix this, we should remove the const keyword when assigning the new value to decimalNumber.
+// console.log(decimalNumber); only exists inside the function.
 // 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
 
 // Finally, correct the code to fix the problem
 // =============> write your new code here
+function convertToPercentage(decimalNumber) {
+  const percentage = `${decimalNumber * 100}%`;
+  return percentage;
+}
+
+console.log(convertToPercentage(0.5));