What is while loop in C++ with examples?

What is while loop in C++ with examples?

While Loop example in C++ #include using namespace std; int main(){ int i=1; /* The loop would continue to print * the value of i until the given condition * i<=6 returns false. */ while(i<=6){ cout<<“Value of variable i is: “<

How do you write a while loop in C++?

C++ do…while Loop Its syntax is: do { // body of loop; } while (condition); Here, The body of the loop is executed at first.

Can we use while loop in place of for loop in C++?

The main difference between for loop and while loop is that in while loop we are supposed to use increment and decrement counter inside the loop so that the loop variables get changed on each iteration, and after successfully running the loop it returns true whereas in for loop we use increment and decrement counter in …

Do While vs while loop C++?

A while loop in C programming repeatedly executes a target statement as long as a given condition is true. The syntax is like below….Output.

While Loop Do-While Loop
The while loop may run zero or more times Do-While may run more than one times but at least once.

How do you end a while loop in C++?

A while loop can also terminate when a break, goto, or return within the statement body is executed. Use continue to terminate the current iteration without exiting the while loop. continue passes control to the next iteration of the while loop. The termination condition is evaluated at the top of the loop.

Why while loop is used in C++?

C++ while loops statement allows to repeatedly run the same block of code until a condition is met. while loop has one control condition, and executes as long the condition is true. The condition of the loop is tested before the body of the loop is executed, hence it is called an entry-controlled loop.

When would you use a while loop instead of a for loop?

In general, you should use a for loop when you know how many times the loop should run. If you want the loop to break based on a condition other than the number of times it runs, you should use a while loop.

Do While VS while example?

KEY DIFFERENCES: While loop checks the condition first and then executes the statement(s), whereas do while loop will execute the statement(s) at least once, then the condition is checked. While loop is entry controlled loop whereas do while is exit controlled loop.

Do While statements in C example?

There is given the simple program of c language do while loop where we are printing the table of 1.

  • #include
  • int main(){
  • int i=1;
  • do{
  • printf(“%d \n”,i);
  • i++;
  • }while(i<=10);
  • return 0;

What is a do while loop example in real life?

Example- you are writing code for a program which return the squares of the numbers user give. Now you don’t know how many numbers user will give, so you have to use the do-while loop. You can use this loop for testing purpose, to check whether your program is giving correct answer.

How do you end a while loop?

To break out of a while loop, you can use the endloop, continue, resume, or return statement. endwhile; If the name is empty, the other statements are not executed in that pass through the loop, and the entire loop is closed.

What is the while loop in C++?

The while loop in C/C++ is used in situations where we do not know the exact number of iterations of loop beforehand. The loop execution is terminated on the basis of the test condition. Syntax: while (test_expression) { // statements update_expression; } The various parts of the While loop are:

What is an example of a DO-WHILE LOOP?

The do-while loop has ended and the flow has gone outside. Example 1: This program will try to print “Hello World” 5 times. Dry-Running Example 1: The program will execute in the following manner.

How to use test expression in while loop?

Test Expression: In this expression we have to test the condition. If the condition evaluates to true then we will execute the body of the loop and go to update expression. Otherwise, we will exit from the while loop.

Which statement is an example of an infinite while loop?

The program is an example of infinite while loop. Since the value of the variable var is same (there is no ++ or – operator used on this variable, inside the body of loop) the condition var<=2 will be true forever and the loop would never terminate.

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