Feature/week 1 exercises

week-1/errors/1.js

@@ -1,4 +1,5 @@
 // trying to create an age variable and then reassign the value by 1
 
-const age = 33;
+let age = 33;
 age = age + 1;
+console.log(age);

week-1/errors/2.js

@@ -1,5 +1,5 @@
 // Currently trying to print the string "I was born in Bolton" but it isn't working...
 // what's the error ?
-
-console.log(`I was born in ${cityOfBirth}`);
 const cityOfBirth = "Bolton";
+console.log(`I was born in ${cityOfBirth}`);
+

week-1/errors/3.js

@@ -1,6 +1,6 @@
 const cardNumber = 4533787178994213;
-const last4Digits = cardNumber.slice(-4);
-
+const last4Digits = cardNumber.toString().slice(-4);
+console.log(last4Digits);
 // The last4Digits variable should store the last 4 digits of cardNumber
 // However, the code isn't working
 // Make and explain a prediction about why the code won't work

week-1/errors/4.js

@@ -1,2 +1,3 @@
-const 12HourClockTime = "20:53";
-const 24hourClockTime = "08:53";
+const twelveHourClockTime = "20:53";
+const twenty_four_hourClockTime = "08:53";
+console.log(twenty_four_hourClockTime + ', ' + twelveHourClockTime);

week-1/exercises/count.js

@@ -1,6 +1,5 @@
 let count = 0;
-
 count = count + 1;
-
+console.log(count);
 // Line 1 is a variable declaration, creating the count variable with an initial value of 0
 // Describe what line 3 is doing, in particular focus on what = is doing

week-1/exercises/decimal.js

@@ -1,6 +1,12 @@
 
 const num = 56.5467;
+const wholeNumberPart = Math.floor(num);
+const decimalPart = num - wholeNumberPart;
+const roundedNum = Math.round(num);
 
+console.log("Whole Number Part:", wholeNumberPart);
+console.log("Decimal Part:", decimalPart); 
+console.log("Rounded Number:", roundedNum); 
 // You should look up Math functions for this exercise https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math
 
 // Create a variable called wholeNumberPart and assign to it an expression that evaluates to 56 ( the whole number part of num )

week-1/exercises/initials.js

@@ -1,6 +1,7 @@
 let firstName = "Creola";
 let middleName = "Katherine";
 let lastName = "Johnson";
-
+let initials = firstName.charAt(0).toUpperCase()+middleName.charAt(0).toUpperCase()+lastName.charAt(0).toUpperCase();
+console.log(initials);
 // Declare a variable called initials that stores the first character of each string in upper case to form the user's initials
 // Log the variable in each case

week-1/exercises/paths.js

@@ -12,7 +12,10 @@
 const filePath = "/Users/mitch/cyf/Module-JS1/week-1/interpret/file.txt";
 const lastSlashIndex = filePath.lastIndexOf("/");
 const base = filePath.slice(lastSlashIndex + 1);
-console.log(`The base part of ${filePath} is ${base}`);
+const dir = filePath.slice(0, lastSlashIndex);
+const lastDotIndex = filePath.lastIndexOf(".");
+const ext = filePath.slice(lastDotIndex + 1);
 
-// Create a variable to store the dir part of the filePath variable
-// Create a variable to store the ext part of the variable
+console.log(`The base part of ${filePath} is ${base}`);
+console.log(`The directory part of ${filePath} is ${dir}`);
+console.log(`The extension part of ${filePath} is ${ext}`);

week-1/exercises/random.js

@@ -2,8 +2,11 @@ const minimum = 1;
 const maximum = 100;
 
 const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum;
-
+console.log(num);
 // In this exercise, you will need to work out what num represents?
 // Try breaking down the expression and using documentation to explain what it means
 // It will help to think about the order in which expressions are evaluated
 // Try logging the value of num several times to build an idea of what the program is doing
+// math.random gives a random decimal number
+// and 100-1+1 = 100;
+// when decimal value multiply with 100 it and math.floor gives a whole no then every this results shows in a different 

week-1/explore/chrome.md

@@ -9,10 +9,13 @@ Let's try an example.
 
 In the Chrome console,
 invoke the function `alert` with an input string of `"Hello world!"`;
-
+A dialog box with message display on top of the page
 What effect does calling the `alert` function have?
+A dialog box with ok button displays with message when user click on ok button the dialog box disappears
 
 Now try invoking the function `prompt` with a string input of `"What is your name?"` - store the return value of your call to `prompt` in an variable called `myName`.
-
+its works properly I use console.log(nyName); it displays my name that is entered on prompt dialog box
 What effect does calling the `prompt` function have?
+A dialog box is opened on the top of the page with a textbox and to buttons ok and cancel
 What is the return value of `prompt`?
+if user click on ok prompt return a string and if user click on cancel it returns null

week-1/explore/objects.md

@@ -5,12 +5,91 @@ In this activity, we'll explore some additional concepts that you'll encounter i
 Open the Chrome devtools Console, type in `console.log` and then hit enter
 
 What output do you get?
-
+'Undefined'
 Now enter just `console` in the Console, what output do you get back?
-
+console {debug: ƒ, error: ƒ, info: ƒ, log: ƒ, warn: ƒ, …}
+assert
+:
+ƒ assert()
+clear
+:
+ƒ clear()
+context
+:
+ƒ context()
+count
+:
+ƒ count()
+countReset
+:
+ƒ countReset()
+createTask
+:
+ƒ createTask()
+debug
+:
+ƒ debug()
+dir
+:
+ƒ dir()
+dirxml
+:
+ƒ dirxml()
+error
+:
+ƒ error()
+group
+:
+ƒ group()
+groupCollapsed
+:
+ƒ groupCollapsed()
+groupEnd
+:
+ƒ groupEnd()
+info
+:
+ƒ info()
+log
+:
+ƒ log()
+memory
+:
+MemoryInfo {totalJSHeapSize: 10000000, usedJSHeapSize: 10000000, jsHeapSizeLimit: 2190000000}
+profile
+:
+ƒ profile()
+profileEnd
+:
+ƒ profileEnd()
+table
+:
+ƒ table()
+time
+:
+ƒ time()
+timeEnd
+:
+ƒ timeEnd()
+timeLog
+:
+ƒ timeLog()
+timeStamp
+:
+ƒ timeStamp()
+trace
+:
+ƒ trace()
+warn
+:
+ƒ warn()
 Try also entering `typeof console`
-
+'object'
 Answer the following questions:
 
 What does `console` store?
+It can not store the information it only display the information
 What does the syntax `console.log` or `console.assert` mean? In particular, what does the `.` mean?
+console is an object and log and assert are both functions '.' is used to access the functions like
+console.log("hello world"); it display the message inside log on console
+console.assert(condition,'message'); if condition is false then it display the message

week-1/interpret/percentage-change.js

@@ -12,9 +12,22 @@ 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 three function calls 
+// 1) carPrice.replaceAll();
+// 2) priceAfterOneYear.replaceAll()
+// 3) console.log()
 
 // b) Identify all the lines that are variable reassignment statements
+// There are two lines of Variable reassignment
+// 1) carPrice = Number(carPrice.replaceAll(",", "")); After removing commas
+// 2) priceAfterOneYear = Number(priceAfterOneYear.replaceAll(",", "")); After removing commas
 
 // c) Identify all the lines that are variable declarations
+// There are four lines of variable declaration
+// 1) let carPrice
+// 2) let priceAfterOneYear
+// 3) const priceDifference
+// 4) const percentageChange
 
 // d) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression?
+// It removes commas to the price and also convert the string into Numbers 

week-1/interpret/time-format.js

@@ -1,4 +1,4 @@
-const movieLength = 8784; // length of movie in seconds
+const movieLength = 86400; // length of movie in seconds
 
 const remainingSeconds = movieLength % 60;
 const totalMinutes = (movieLength - remainingSeconds) / 60;
@@ -14,16 +14,34 @@ 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?
+// 1) const movieLength 
+// 2) const remainingSeconds 
+// 3) const remainingMinutes
+// 4) const totalHours
+// 5) const remainingHours
+// 6) const result
 
 // b) How many function calls are there?
+//    console.log(result);
 
 // c) Using documentation on MDN, explain what the expression movieLength % 60 represents
+//   The operator % is modulus operator that gives reminder result It divide the movieLength value with 60
 
 // d) Interpret line 4, what does the expression assigned to totalMinutes mean?
+//    const totalMinutes = (movieLength - remainingSeconds) / 60;
+//    movieLength - remainingSeconds: Removes the extra seconds that aren't part of a full minute from the total seconds.
+//    Converts the remaining time (in seconds) into minutes by dividing the total seconds by 60.
 
 // e) What do you think the variable result represents? Can you think of a better name for this variable?
+//    I think movieTotalTime is better because this program is about movie time so its better to assign variable name clearly
 
 // f) Think about whether this program will work for all values of movieLength.
+//    yes this code is work for all values in second only 24hours formate shows true result
+
 //    Think of what values may cause problems for the code.
+//    I enter 86400 value that is not work properly 
+
 //    Decide the result should be for those values, then test it out.
+//    the result is 0:0:0 on entering 86400
 //    Can you find any values of movieLength which don't give you what you'd expect?
+//    yes the value that is greater then or equal to 86400 then code did not work properly 

week-1/interpret/to-pounds.js

@@ -1,19 +1,11 @@
 const penceString = "399p";
 
-const penceStringWithoutTrailingP = penceString.substring(
-  0,
-  penceString.length - 1
-);
+const penceStringWithoutTrailingP = penceString.substring(0,penceString.length - 1);
 
 const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0");
-const pounds = paddedPenceNumberString.substring(
-  0,
-  paddedPenceNumberString.length - 2
-);
-
-const pence = paddedPenceNumberString
-  .substring(paddedPenceNumberString.length - 2)
-  .padEnd(2, "0");
+const pounds = paddedPenceNumberString.substring(0,paddedPenceNumberString.length - 2);
+
+const pence = paddedPenceNumberString.substring(paddedPenceNumberString.length - 2).padEnd(2, "0");
 
 console.log(`£${pounds}.${pence}`);