answered the questions

Author: mshayriyesaricicek

Sprint-1/3-mandatory-interpret/1-percentage-change.js

@@ -12,11 +12,25 @@ console.log(`The percentage change is ${percentageChange}`);
 // Read the code and then answer the questions below
 
 // a) How many function calls are there in this file? Write down all the lines where a function call is made
+// there are 4 function calls - Replace All is called twice and Number is called twice
+// if console.log is considered a function call then there are 5 function calls in total 
 
 // b) Run the code and identify the line where the error is coming from - why is this error occurring? How can you fix this problem?
+// there is a comma missing in line 5 it should be 
+// priceAfterOneYear = Number(priceAfterOneYear.replaceAll(",", ""));
+// Replace All requires two arguments which should be separated by a comma, without the comma
+// it cannot tell where the first argument ends and the second argument begins
 
 // c) Identify all the lines that are variable reassignment statements
+// there are 2 variable reassignment statements
+// carPrice is reassigned on line 4 - the original value was declared in the let statement on line 1
+// priceAfterOneYear is reassigned on line 5 - the original value was declared in the let statement on line 2
 
 // d) Identify all the lines that are variable declarations
+// variable declarations are where the variable is declared for the first time
+// This happens in lines 1, 2 with let statements and in lines 7, 8 with const statements
 
 // e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression?
+// it replaces the commas in the numbers such as 20,000 so calculations can be done 
+// with commas the numbers are recognised as a string but with spaces they can be recognised as numbers
+// calculations cannot be performed on strings so they need to be converted to numbers