Understanding Loops

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Questions and Answers

How many times will the following code snippet print "Welcome to Java"?

9
8
11
10 (correct)

Given the code snippet, which statement about the value of `count` is always true at Point A?

`count < 100` is always false at Point A
`count > 100` is always true at Point A
`count < 100` is always true at Point A (correct)
`count > 100` is always false at Point A

How many times will "Welcome to Java" be printed by this code?

8
9
11
10 (correct)

What is the final value of `x` after executing the following code?

4 (B)

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What will be displayed when the following code is executed?

<code>3 0</code> (C)

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How many times will the following code print "Welcome to Java"?

10 (C)

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Analyze the following `for` loop. What will happen when this code is executed?

The program compiles and runs fine. (B)

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What is printed to the console after the following code executes?

45 (C)

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Is the following `for` loop correct?

Yes (A)

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How many times will the following code print `Hello World`?

10 (C)

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What is the value of result after the following code executes?

120 (A)

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What will the following code output?

0 1 2 3 4 (C)

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How many times will the inner loop execute in the following nested loop structure?

25 (A)

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How will you rewrite the given `while` loop using a `for` loop?

<code>for (int i = 0; i <= 10; i++) { System.out.println(i);}</code> (C)

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What is the purpose of the `break` statement in a loop?

To terminate the loop entirely. (D)

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When is the condition in a `do-while` loop checked?

At the end of the loop. (C)

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What will be the output of the following code?

Will result in infinite loop (A)

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What is wrong with the following code snippet?

Condition part is missing in the loop's parameters (C)

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How will you stop the mentioned loop structure to print only odd numbers?

Add <code>continue</code> statement when <code>i</code> is even (B)

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Flashcards

What is a loop?

A control flow statement that allows code to be executed repeatedly based on a boolean condition.

What is a `while` loop?

The while loop executes a block of code as long as a specified condition is true. It checks the condition before each iteration.

What is a `do-while` loop?

The do-while loop executes a block of code once, and then repeats as long as a condition is true. It checks the condition after each iteration, guaranteeing at least one execution.

What is a `for` loop?

The for loop executes a block of code a specific number of times, often used when the number of iterations is known. It includes initialization, condition, and increment/decrement steps.

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What is a `break` statement?

A statement that terminates a loop, regardless of whether the loop condition is still true.

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What is a `continue` statement?

A statement that skips the rest of the current iteration of a loop and proceeds to the next iteration.

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What is an infinite loop?

A loop that never terminates because its condition is always true.

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Loop initialization

Initializing a loop control variable before the loop starts. Necessary for the loop to behave as expected.

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Loop increment/decrement

Updating the loop control variable in each iteration, typically to move towards the termination condition.

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Loop continuation condition

Specifies the condition under which the loop will continue to execute.

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Study Notes

Code with a while loop prints "Welcome to Java" 10 times because the loop continues as long as count is less than 10, incrementing count each time.
In a while loop, a condition count < 100 is always true at the beginning of the loop (Point A), may become false inside the loop (Point B), and is false after exiting the loop (Point C).
A while loop with count++ < 10 prints "Welcome to Java" 10 times due to post-incrementing count and checking against 10.
A while loop increments x from 0 to 4, printing "x is 4" after the loop finishes.
A while loop reduces number by 3 in each iteration and prints the updated number, resulting in "3 0" being displayed.
A do-while loop prints "Welcome to Java" 10 times as it executes the loop body before checking the condition.
The loop is executed for the first time when count is 0. count increments by 1 and uses the old count value to check if count < 10, the loop executes 11 times for count from 0 to 10, printing "Welcome to Java" 11 times.
After the loop is exited the loop body is executed before the loop is exited.
A for loop with an empty action-after-each-iteration section compiles and runs without issues.
A for loop that adds i to y ten times produces y = 45 since it sums numbers from 0 to 9.
A for loop is correct and equivalent to for (; true; ).

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Understanding Loops

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Podcast

Questions and Answers

How many times will the following code snippet print "Welcome to Java"?

Given the code snippet, which statement about the value of count is always true at Point A?

How many times will "Welcome to Java" be printed by this code?

What is the final value of x after executing the following code?

What will be displayed when the following code is executed?

How many times will the following code print "Welcome to Java"?

Analyze the following for loop. What will happen when this code is executed?

What is printed to the console after the following code executes?

Is the following for loop correct?

How many times will the following code print Hello World?

What is the value of result after the following code executes?

What will the following code output?

How many times will the inner loop execute in the following nested loop structure?

How will you rewrite the given while loop using a for loop?

What is the purpose of the break statement in a loop?

When is the condition in a do-while loop checked?

What will be the output of the following code?

What is wrong with the following code snippet?

How will you stop the mentioned loop structure to print only odd numbers?

Flashcards

What is a loop?

What is a while loop?

What is a do-while loop?

What is a for loop?

What is a break statement?

What is a continue statement?

What is an infinite loop?

Loop initialization

Loop increment/decrement

Loop continuation condition

Study Notes

Studying That Suits You

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Given the code snippet, which statement about the value of `count` is always true at Point A?

What is the final value of `x` after executing the following code?

Analyze the following `for` loop. What will happen when this code is executed?

Is the following `for` loop correct?

How many times will the following code print `Hello World`?

How will you rewrite the given `while` loop using a `for` loop?

What is the purpose of the `break` statement in a loop?

When is the condition in a `do-while` loop checked?

What is a `while` loop?

What is a `do-while` loop?

What is a `for` loop?

What is a `break` statement?

What is a `continue` statement?

C# Programming: Loop (While & Do-While)