List Manipulation Basics

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Questions and Answers

What does the code V[i] = TextWindow.Read() assign to cell V[i]?

The value that was read from the keyboard.

The variable i is used as a ______ for the loop.

counter

The variable i initializes to 1.

True (A)

The loop continues until the condition i<5 is true.

<p>False (B)</p> Signup and view all the answers

What is the purpose of the keyword while in the loop?

<p>To repeat a block of code until a specific condition is met.</p> Signup and view all the answers

What is the purpose of i=i+1 in the loop?

<p>It increases the value of <code>i</code> by one each time the loop is executed.</p> Signup and view all the answers

The value of i is incremented by i=i+1 only when it reaches the last cell of the list.

<p>False (B)</p> Signup and view all the answers

Match the code snippets with their corresponding description:

<p><code>TextWindow.WriteLine(i + 1 + &quot; of the list&quot;)</code> = Displays the current iteration number within the list <code>V[i] = TextWindow.Read()</code> = Reads data from the keyboard and assigns it to the current list cell <code>i = 1</code> = Initializes the counter variable <code>while i&lt;5</code> = Determines when the loop should end <code>i = i + 1</code> = Increases the counter variable by one after each iteration</p> Signup and view all the answers

After the first turn of the loop, what is the value of V[1]?

<p>The value that the user typed in at the keyboard.</p> Signup and view all the answers

After the second turn of the loop, what is the value of V[2]?

<p>The value that the user typed in at the keyboard.</p> Signup and view all the answers

What is the purpose of the code TextWindow.WriteLine(i + 1 + " of the list")?

<p>It displays the current cell number within the list.</p> Signup and view all the answers

The counter is initialized to 0.

<p>False (B)</p> Signup and view all the answers

Each time the loop completes one turn, the counter is increased by 1.

<p>True (A)</p> Signup and view all the answers

The loop is executed until the i value equals 4.

<p>False (B)</p> Signup and view all the answers

What is the purpose of the statement TextWindow.WriteLine(i + 1 + " of the list")?

<p>To display the current index of the list item being processed during each iteration.</p> Signup and view all the answers

This code snippet will display the index of the cell on each line.

<p>True (A)</p> Signup and view all the answers

What does the keyword while signify in the loop?

<p>The loop will continue to iterate as long as the <code>while</code> condition remains true.</p> Signup and view all the answers

The statement i = i + 1 is only executed when the condition i<5 is true.

<p>False (B)</p> Signup and view all the answers

What is the purpose of introducing i = 1 at the beginning of the loop?

<p>It initializes the counter variable.</p> Signup and view all the answers

The i value is increased at the beginning of each turn.

<p>False (B)</p> Signup and view all the answers

What is the main task of the loop?

<p>To process each cell in the list sequentially.</p> Signup and view all the answers

The loop will end when the value of i becomes greater than 4.

<p>True (A)</p> Signup and view all the answers

What is the purpose of the code V[i] = TextWindow.Read()? What does it do?

<p>This code snippet reads a value entered by the user from the keyboard and stores it in the corresponding cell of the list.</p> Signup and view all the answers

In this loop, cell 1 is processed before cell 2.

<p>True (A)</p> Signup and view all the answers

What does the variable i represent in the code?

<p>The index or the position of a list cell.</p> Signup and view all the answers

If the user types the value 5 into the keyboard then the loop assigns the value 5 into cell V[1]

<p>True (A)</p> Signup and view all the answers

The loop will continue until the i value reaches 5.

<p>True (A)</p> Signup and view all the answers

What is the purpose of the code i = i + 1 in the loop?

<p>This statement increments the value of the counter variable <code>i</code> by 1 after each loop iteration.</p> Signup and view all the answers

The code TextWindow.WriteLine(i + 1 + " of the list") will display the index number of the cell being processed on each line.

<p>True (A)</p> Signup and view all the answers

The assignment of the variable i is done outside the loop.

<p>False (B)</p> Signup and view all the answers

The loop is executed 4 times

<p>False (B)</p> Signup and view all the answers

What is the purpose of TextWindow.WriteLine in the context of the code snippet provided?

<p>It displays the current index of the cell being processed within the loop.</p> Signup and view all the answers

The loop will process every cell in the list once and only once.

<p>True (A)</p> Signup and view all the answers

The loop will end when the i value reaches the last cell of the list.

<p>False (B)</p> Signup and view all the answers

What is the purpose of using a variable i as a counter in this loop?

<p>It keeps track of the current cell being processed within the loop.</p> Signup and view all the answers

What is the purpose of the conditional statement while i<5 in the loop?

<p>It determines the number of times the loop will iterate.</p> Signup and view all the answers

The code will display the value of i on each line.

<p>False (B)</p> Signup and view all the answers

Each time cell V[i] is assigned a new value, the value of i is increased by one.

<p>True (A)</p> Signup and view all the answers

What is the purpose of the code while i < 5?

<p>It controls how many times the loop runs, ensuring that it processes each cell in the list exactly once.</p> Signup and view all the answers

What is the purpose of the assignment statement i = i + 1 located inside the loop? How does it work?

<p>This statement is used to increment the value of the counter <code>i</code> by 1 after each loop iteration.</p> Signup and view all the answers

The variable i is used to keep track of the current cell being processed within the list.

<p>True (A)</p> Signup and view all the answers

The i value is increased by 1 after processing a cell.

<p>True (A)</p> Signup and view all the answers

What is the purpose of the loop? What is its main task?

<p>The loop is designed to systematically process each cell in the list, acquiring input from the user and storing it in the corresponding cell.</p> Signup and view all the answers

Each time the loop executes, the code TextWindow.WriteLine(i + 1 + " of the list") displays the current index of the cell on the screen.

<p>True (A)</p> Signup and view all the answers

The loop begins by assigning the value of i to 1.

<p>True (A)</p> Signup and view all the answers

The value of i increases after each iteration of the loop.

<p>True (A)</p> Signup and view all the answers

What is the purpose of the loop in the context of the code snippet provided?

<p>It allows the program to read user input and store it sequentially into the cells of a list.</p> Signup and view all the answers

The condition i < 5 in the while statement determines if the loop should continue to run or stop.

<p>True (A)</p> Signup and view all the answers

The loop will end after processing the fifth cell in the list.

<p>True (A)</p> Signup and view all the answers

The value of i is increased after a specific number of turns, not after each turn.

<p>False (B)</p> Signup and view all the answers

The loop assigns a value from the keyboard to each cell in the list.

<p>True (A)</p> Signup and view all the answers

What is the purpose of the code V[i] = TextWindow.Read() in the context of the provided loop? What does it actually do?

<p>This statement reads a value from the keyboard, which the user enters, and then assigns that value to the cell at index <code>i</code> in the list.</p> Signup and view all the answers

The loop is executed until the value of i is equal to 5.

<p>True (A)</p> Signup and view all the answers

The loop will ensure that each cell in the list receives a value from the keyboard.

<p>True (A)</p> Signup and view all the answers

What is the purpose of the code while i < 5 in this context? What does it control?

<p>It controls how many times the loop iterates, ensuring that each cell in the list is processed exactly once.</p> Signup and view all the answers

The loop will assign a value from the keyboard to cell V[5] one and only one time.

<p>False (B)</p> Signup and view all the answers

The while loop ensures that the code within its block is executed repeatedly until a specific condition is met.

<p>True (A)</p> Signup and view all the answers

Flashcards

String

A sequence of characters that is used to store text data.

List

A data structure that stores a collection of elements in a specific order.

While Loop

A type of loop where a code block is executed repeatedly until a specific condition is met.

Counter Variable

A variable that keeps track of the current position or iteration within a loop.

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Filling a List

The process of assigning values to elements within a list.

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User Input

A prompt that asks the user to enter information.

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Storing Input

The action of storing user input into a specific location within a list.

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Incrementing a Counter

The process of incrementing a counter variable, usually by adding 1.

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Displaying List Content

The action of displaying the contents of a data structure, such as a list.

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Looping

The process of repeating a code block while a specific condition is true.

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Condition Check

The act of checking if a condition is true or false, determining whether to continue or exit a loop.

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Loop Exit

The point where a loop finishes and program execution continues to the next instruction.

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Cell

A specific index or position within a list.

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Cell Indexing

A way to access individual elements within a list using their corresponding positions.

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Cell Value

A value stored in a particular cell of a list.

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Assigning Values

The process of assigning values to specific locations within a data structure, often used in loops to initialize or modify elements.

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Cell Variable

A variable used to store a value at a specific index within a data structure.

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Length of a Data Structure

A variable that represents the total number of elements in a data structure.

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Processing Data

Performing actions based on the values stored in a data structure, typically used in loops to process and analyze data.

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Algorithm

A sequence of steps performed repeatedly to achieve a specific outcome, often involving loops and data structures, used to perform tasks such as reading data, manipulating data, and displaying results.

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Study Notes

Manipulating a List

  • Lists can be filled, searched, and modified
  • Filling a list often uses loops
  • Example:
    • Counter i initialized to 1
    • Loop runs until i is less than or equal to 5
    • Prompts user to enter value for cell v[i]
    • Increments i after each input
  • Displaying list content
    • Loop runs until i is less than or equal to 5
    • Displays the value of v[i] for each i
  • In a loop, counter i acts as both a counter of the loop and a pointer for cells in the list v

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