What is the difference between "for", "while" & "do-while" Loops? When should each be used?
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What is the difference between "for", "while" & "do-while" Loops? When should each be used?
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- write the code to lookup, add and remove phoneentries from the phonebook text file . These are the code we use for the lookup, add and remove in the case statement.(Lookup)# Look someone up in the phone bookgrep $1 phonebook (add)echo "$1 $2" >> phonebooksort -o phonebook phonebook (Remove)grep -v "$1" phonebook > /tmp/phonebookmv /tmp/phonebook phonebook Write a complete Bash script which will accept up to three command-line arguments: the first one is either (lookup, add or remove), the second one is a name enclosed in single quotes and the third one (if doing an add) is a phone number enclosed in single quotes. Using a case statement to match on either lookup, add or remove, the script should then perform the requested operation. Again here, you should first check for null arguments before continuing with the rest of the script or requested operation. In addition, the person may not be in the phonebook for lookup or remove so, you need to account for this.Using Python: Open the “romeo" png file and create a list of all the unique words found in the file. Once you have the list, sort them in alphabetical order. See attached screenshot for target output. Keep your code as simple as you can.Please answer in python
- Answer All the questions. Make sure your answers are short and precise. You can use (Q1.txt or Ed) files to check your answers for Q1. 1. The phone numbers collected from questionnaire is a mess. Design a regular expression to filter out those numbers that are stored in the standard format "+00-0-0000-0000" from the file called "Q1.txt" and redirect the results to the "cleaned.txt". +61392144979 +61 3 9214 4778 +61-3-9214-4980 +66(2)51574430 +61-3-9285-7706 Note: Only +61-3-9214-4980 and +61-3-9285-7706 are the valid results..Write code for below problem. The input below is just an example and you should implement independent from the input. Please paste the link to the answer shared using pastebin, dotnetfiddle, jsfiddle, or any other similar web-site. You will have an orthogonal triangle input from a file and you need to find the maximum sum of the numbers according to given rules below; 1. You will start from the top and move downwards to an adjacent number as in below. 2. You are only allowed to walk downwards and diagonally. 3. You can only walk over NON PRIME NUMBERS. 4. You have to reach at the end of the pyramid as much as possible. 5. You have to treat your input as pyramid. According to above rules the maximum sum of the numbers from top to bottom in below example is 24. *1 *8 4 2 *69 85*9 3 As you can see this has several paths that fits the rule of NOT PRIME NUMBERS; 1>8>6>9, 1>4>6>9, 1>4>9>9 1 + 8 + 6 + 9 = 24. As you see 1, 8, 6, 9 are all NOT PRIME NUMBERS and walking over these yields the…7. Write a small programme, using a for loop and the disp() command, to display the value of the loop variable each time you go through the loop, where the loop variable goes from 5 to 17 inclusive. 8. Write a for loop which adds up all of the cubes of the odd integers between 200 and 800. Only display the final answer. Include a simple check that your programme is working properly, by duplicating the code but only adding up the first three terms in the sum. Because you are dealing with only a few terms you can also get an answer by hand, or calculator, or Matlab, to see if this program gives the correct answer. If your loop is working properly you only then need to change the upper limit of the loop to get the final answer. Note: you will need to display your answers in long format.
- Provide screenshot of code and output please ans also in text and kindly do it correctly and get likes.Question no 02:Design a class in python which implements the _iter() and __next_() methods to give the sequence from 1 to 100. Print the sequence generated by the object of that class using for loop.File names: color_square.py, chessboard.py, test_squares.py Positions on a chess board are identified by a letter and a number. The letter identifies the column; the number identifies the row. See the image below. You will provide the functions that allow us to determine: if a chessboard square is either black or white, given its coordinates. If the row/column is valid or not for the standard chessboard For example, if we pass in “d” for the column and 4 for the row, your function that determines color should return the string: “BLACK”. If we pass in "k" for the column to your function that validates columns, that function should return the boolean False. Requirements: Your function for validating the column should be able to accept upper or lowercase strings as parameters. Your functions for validating the row should be able to accept integers or strings as parameters. Your function that determines black-or-white may assume that the input has been validated prior to us calling…First, take your program and add one more feature: at the end, just before you close the file, write the word “END” all by itself on a line. Run that program once to create a file of items with “END”. Instead of reading from cin and writing to a file, you read from your file and write to cout. The only tricky part is deciding when to stop reading. In your previous code, you stopped reading when the user said they didn’t want to continue. For the new code, keep reading until you read “END” for the name of the produce. You can use “==” on strings, so if (product name == ”END”) will tell you that you can stop reading. My code: #include<iostream>#include<string.h>#include<fstream>using namespace std; int main(){ string filename; cout<<"Enter the name of the file to store the information"<<endl; getline(cin,filename); ofstream fileptr(filename.c_str()); if(!fileptr.is_open()) { cout<<"Couldn't open a file"<<endl; }…
- Copy Assignment 1 to Assignment 2. Relabel this assignment to be Assignment 2. If there were comments made regarding the grading of Assignment 1, apply those changes to assignment 2. 1. Modify this program to open the file "Customers.dat" so that all data can be read, and data written or appended to this file. 2. Add an option 2 and 3 to the menu so that the menu appears as below:Menu options '2' and '3' should now be considered a valid choice. 1. 1. Add Data 2. Update Data 3. Display all data X. Exit Program 3. Create a method called "getLargestCustomerNumber" and call it after the "Customers.dat" file has been opened. Read all the existing customerNumbers and determine the largest customerNumber. Use this number as the base when adding new customer data. 4. The program should be able to start multiple times and add data with increasing customerNumbers. There should be no duplicated customer numbers. 5. Menu Option 2 should do the following tasks a. Prompt for a customer number to…Go to your main.py file. On the first line, add a docstring explaining what your file does. Then, assign a variable called whole_num to the user’s input and cast it to an integer. Next, print 10 underscores as the top border of the table. On the first line print your whole number, then multiply your whole number by multiples of 2's till 10 and print that out. Finally, print 10 underscores again for the bottom border of the table, as in step 3. Run the file by using the python3 main.py command.DO NOT COPY FROM OTHER WEBSITES Code with comments and output screenshot is must for an Upvote. Thank you!