first formula related file in javascript

Author: gaireprakash20-ops

Sprint-2/3-mandatory-interpret/1-percentage-change.js

@@ -2,7 +2,7 @@ let carPrice = "10,000";
 let priceAfterOneYear = "8,543";
 
 carPrice = Number(carPrice.replaceAll(",", ""));
-priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ""));
+priceAfterOneYear = Number(priceAfterOneYear.replaceAll(",",""));
 
 const priceDifference = carPrice - priceAfterOneYear;
 const percentageChange = (priceDifference / carPrice) * 100;
@@ -12,11 +12,24 @@ 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
-
-// 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?
-
-// c) Identify all the lines that are variable reassignment statements
-
-// d) Identify all the lines that are variable declarations
-
-// e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression?
+/* there has five function in line 4 and  and console . log also has one 
+line 4 and 5 has two Number() function
+line 4 and 5 has two replaceALL() function
+line 10 has one console . log ()
+
+/* 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?
+   In line five error shown in replaceAll("," "")); missing comma before last two comma(",","").
+
+/* c) Identify all the lines that are variable reassignment statements
+line 4 carPrice = Number(carPrice.replaceAll(",", ""));
+line 5 priceAfterOneYear = Number(priceAfterOneYear.replaceAll(",", ""));
+As per the carPrice and priceAfterOneYear has been declared in line 1 and 2 by using let variable.
+
+/*d) Identify all the lines that are variable declarations
+line 1 let carPrice = "10,000";
+line 2 let priceAfterOneYear = "8,543";
+line 7 const priceDifference = carPrice - priceAfterOneYear;
+line 8 const percentageChange = (priceDifference / carPrice) * 100;
+
+/* e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression?
+replaceALL throwout all the commas from the string and number became numerical value.

Sprint-2/3-mandatory-interpret/2-time-format.js

@@ -1,5 +1,4 @@
-const movieLength = 8784; // length of movie in seconds
-
+const movieLength = 8784; 
 const remainingSeconds = movieLength % 60;
 const totalMinutes = (movieLength - remainingSeconds) / 60;
 
@@ -8,18 +7,28 @@ const totalHours = (totalMinutes - remainingMinutes) / 60;
 
 const result = `${totalHours}:${remainingMinutes}:${remainingSeconds}`;
 console.log(result);
+//
 
 // For the piece of code above, read the code and then answer the following questions
 
 // a) How many variable declarations are there in this program?
+/* line 1 const movieLength  line 3 const remainingSeconds line 4 const totalMinutes
+   line 6 const remainingMinutes line 7 const totalHours  line 9 const result
 
 // b) How many function calls are there?
+/* there are one function 
+      console.log(result);
 
 // c) Using documentation, explain what the expression movieLength % 60 represents
 // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Arithmetic_Operators
+/*The remainder (%) operator returns the remainder left over when one operand is divided by a second operand. It always takes the sign of the dividend.
 
 // d) Interpret line 4, what does the expression assigned to totalMinutes mean?
+/* This expression convert movies time second into minutes dividend by 60 second.
 
 // e) What do you think the variable result represents? Can you think of a better name for this variable?
+/* The variable represent the movieLength in second,minutes and hours. 
+    We can change this name as movieTime.
 
 // f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer
+/* In this section we can only use the positive natural numbers  but if we put numbers that divide by 60 without a remainder get the exact time like 10, 20 50.

Sprint-2/3-mandatory-interpret/3-to-pounds.js

@@ -4,18 +4,23 @@ const penceStringWithoutTrailingP = penceString.substring(
   0,
   penceString.length - 1
 );
-
+// remove the p from the "399p" and make "399"
 const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0");
+//padStart() add characters to the starting of the string and provide 3 long characters.
+//Because we have to convert pound and pence.
 const pounds = paddedPenceNumberString.substring(
   0,
   paddedPenceNumberString.length - 2
 );
+// we take out the 2 character and store the remaining part of the string as the pound.
 
 const pence = paddedPenceNumberString
   .substring(paddedPenceNumberString.length - 2)
   .padEnd(2, "0");
+  // At last we get the last two characters as the pence.
 
 console.log(`£${pounds}.${pence}`);
+//We can display the price of pound and pence like £3.99.
 
 // This program takes a string representing a price in pence
 // The program then builds up a string representing the price in pounds