Chapter 4 Flashcards | Quizlet ~ CNBCInfo

A Loop in PHP is an Iterative Control Structure that involves executing the same number of code a number of times until a certain condition is met. PHP For, ForEach, While, Do While loopIn do-while loop, the while condition is written at the end and terminates with a semi-colon (;) The following loop program in C illustrates the working of a do-while loop: Below is a do-while loop in C example to print a table of number 2:In the following code, what values could be read into number to terminate the while loop? Scanner keyboard = new Scanner(System.in); System.out.print("Enter a number ");In the following code, what values could be read into number to terminate the while loop? Scanner keyboard = new Scanner(System.in); System.out.print("Enter a number: ");In the following code, what values could be read into number to terminate the while loop? Scanner keyboard = new Scanner(System.in); System.out.print("Enter a number: ");

C Loops: For, While, Do While, Looping Statements with Example

In the following code, what values could be read into number to terminate the while loop? Scanner keyboard = new Scanner(System.in); System.out.print("Enter a number: ");I assume you're referring to a do-while loop in languages like C, C++, C#, and languages influenced directly or indirectly by those languages. In the do-while loop, the conditional test is performed at the bottom of the loop. Therefore, even if th...5. In the following code, what values could be read into number to terminate the while loop? Scanner keyboard- new Scanner(System.in); System.out.print("Enter a number: "); int number-keyboard.nextInt; while (number < 100 && number> 500) System.out.print("Enter another number: "); number keyboard.nextlnt);If a loop does not contain within itself a way to terminate, it is called a(n)

CSC: Chapter 4 Quiz Flashcards - Questions and Answers

The while loop continues until the user enters a negative number. During each iteration, the number entered by the user is added to the sum variable. When the user enters a negative number, the loop terminates. Finally, the total sum is displayed.break and continue Statements #. The break and continue statements allow you to control the while loop execution.. The break statement terminates the current loop and passes program control to the statement that follows the terminated loop. The most common situation is to use break to terminate the loop when a certain condition is met.. In the following example, the execution of the loop isIn the script above, we again declare a variable @count and initialize it with 1. Next, a while loop is executed until the value of the @count variable becomes greater than 10, which means that the while loop executes 10 times. In the body of the while loop, the INSERT query is being used to insert one record into the Cars table.• If the first input read is 0, the loop body never executes, and the resulting sum is 0. • The do-while loop executes the loop body first, and then checks the loop-continuation condition to determine whether to continue or terminate the loop. Enter an int value (the program exits if the input is 0): 2The following part of your code is doing this: int number; int total = 0; Step - 2: Now you're providing input values. Then the input values are entering the while loop. The while loop will continue to execute unless your input value is 1. Your first input is 4, 4!=1, so, it enters the loop.

In computer programming, loops are used to repeat a block of code.

For example, shall we embrace we want to show a message one hundred times. Then as an alternative of writing the print commentary one hundred occasions, we will use a loop.

That was just a simple example; we will be able to reach much more efficiency and sophistication in our systems by making efficient use of loops.

There are 3 sorts of loops in C++.

for loop while loop do...while loop

In the previous instructional, we learned about the C++ for loop. Here, we are going to know about while and do...while loops.

C++ while Loop

The syntax of the while loop is:

while (situation) // body of the loop

Here,

A while loop evaluates the condition If the condition evaluates to true, the code inside the while loop is completed. The situation is evaluated again. This process continues till the situation is false. When the condition evaluates to false, the loop terminates.

To learn more about the conditions, visit C++ Relational and Logical Operators.

Flowchart of while Loop Flowchart of C++ while loopExample 1: Display Numbers from 1 to 5 // C++ Program to print numbers from 1 to 5 #include <iostream> using namespace std; int primary() int i = 1; // while loop from 1 to 5 while (i <= 5) cout << i << " "; ++i; return 0;

Output

1 2 Three Four 5

Here is how the program works.

Iteration Variable i <= 5 Action 1st i = 1 true 1 is outlined and that i is greater to 2. second i = 2 true 2 is printed and i is greater to 3. 3rd i = 3 true Three is printed and that i is increased to 4 4th i = 4 true Four is printed and i is greater to 5. fifth i = 5 true Five is outlined and i is larger to 6. 6th i = 6 false The loop is terminated Example 2: Sum of Positive Numbers Only // program to find the sum of positive numbers // if the person enters a detrimental number, the loop ends // the negative number entered isn't added to the sum #come with <iostream> using namespace std; int primary() int number; int sum = 0; // take enter from the user cout << "Enter a number: "; cin >> number; while (number >= 0) // upload all positive numbers sum += number; // take enter once more if the number is positive cout << "Enter a number: "; cin >> number; // show the sum cout << "\nThe sum is " << sum << endl; return 0;

Output

Enter a number: 6 Enter a number: 12 Enter a number: 7 Enter a number: 0 Enter a number: -2 The sum is 25

In this program, the user is triggered to input a number, which is stored in the variable number.

In order to retailer the sum of the numbers, we claim a variable sum and initialize it to the value of 0.

The while loop continues until the consumer enters a detrimental number. During each and every iteration, the number entered by way of the person is added to the sum variable.

When the consumer enters a detrimental number, the loop terminates. Finally, the total sum is displayed.

C++ do...while Loop

The do...while loop is a variant of the while loop with one important distinction: the body of do...while loop is achieved as soon as before the situation is checked.

Its syntax is:

do // frame of loop; while (situation);

Here,

The frame of the loop is performed in the beginning. Then the situation is evaluated. If the situation evaluates to true, the frame of the loop within the do commentary is performed again. The situation is evaluated once once more. If the situation evaluates to true, the frame of the loop inside of the do remark is performed once more. This procedure continues until the situation evaluates to false. Then the loop stops. Flowchart of do...while Loop Flowchart of C++ do...while loopExample 3: Display Numbers from 1 to 5 // C++ Program to print numbers from 1 to 5 #come with <iostream> the usage of namespace std; int primary() int i = 1; // do...while loop from 1 to 5 do cout << i << " "; ++i; while (i <= 5); return 0;

Output

1 2 3 4 5

Here is how the program works.

Iteration Variable i <= 5 Action i = 1 no longer checked 1 is outlined and i is increased to 2 1st i = 2 true 2 is outlined and that i is higher to 3 2d i = 3 true Three is outlined and that i is greater to 4 third i = 4 true Four is printed and i is higher to 5 4th i = 5 true 5 is printed and that i is increased to 6 fifth i = 6 false The loop is terminated Example 4: Sum of Positive Numbers Only // program to in finding the sum of sure numbers // If the consumer enters a negative number, the loop ends // the unfavorable number entered is not added to the sum #come with <iostream> the usage of namespace std; int main() int number = 0; int sum = 0; do sum += number; // take enter from the user cout << "Enter a number: "; cin >> number; while (number >= 0); // show the sum cout << "\nThe sum is " << sum << endl; go back 0;

Output 1

Enter a number: 6 Enter a number: 12 Enter a number: 7 Enter a number: 0 Enter a number: -2 The sum is 25

Here, the do...while loop continues till the user enters a negative number. When the number is damaging, the loop terminates; the unfavorable number is not added to the sum variable.

Output 2

Enter a number: -6 The sum is 0.

The frame of the do...while loop runs most effective once if the consumer enters a adverse number.