answered 1-key-errors 1.js

Author: leerogerfn

Sprint-3/1-key-errors/0.js

@@ -11,7 +11,6 @@
 //  return str;
 //}
 
-
 // =============> write your explanation here
 //"str" has been declared in function. In the local scope of original code, str declared again.
 //It caused the problem of redeclaration. Delete the "let" in local scope
@@ -21,6 +20,4 @@ function capitalise(str) {
   return str;
 }
 
-console.log(capitalise('roger'))
-
-
+console.log(capitalise("roger"));

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

@@ -2,19 +2,31 @@
 
 // Why will an error occur when this program runs?
 // =============> write your prediction here
+// A: There have the problem of redeclaration of the statement of decimalNumber. Local Scope should return to decimalNumber instead.
+// To print the code, the code should be console.log(decimalNumber)
 
 // 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
+//A: In the local scope, remove "const decimalNumber = 0.5". for the second line of local scope, 'const percentage' should be change to
+//'decimalNumber' to avoid redeclaration and refer the correct variable. and return the function to 'decimalNumber'
+//finally console.log(convertToPercentage(0.5)) should be used to print the function.
 
 // Finally, correct the code to fix the problem
 // =============> write your new code here
+
+function convertToPercentage(decimalNumber) {
+  decimalNumber = `${decimalNumber * 100}%`;
+
+  return decimalNumber;
+}
+
+console.log(convertToPercentage(0.5));