Quick Answer: How Do You Use A While Loop?

What is while loop example?

Example of while loop step1: The variable count is initialized with value 1 and then it has been tested for the condition.

step2: If the condition returns true then the statements inside the body of while loop are executed else control comes out of the loop..

What is Loop example?

A loop is used for executing a block of statements repeatedly until a particular condition is satisfied. For example, when you are displaying number from 1 to 100 you may want set the value of a variable to 1 and display it 100 times, increasing its value by 1 on each loop iteration.

What are the 3 types of loops?

Loops are control structures used to repeat a given section of code a certain number of times or until a particular condition is met. Visual Basic has three main types of loops: for.. next loops, do loops and while loops.

What is for loop while loop and do while loop?

It executes a block of statements number of times until the condition becomes false. Loops are of 2 types: entry-controlled and exit-controlled. ‘C’ programming provides us 1) while 2) do-while and 3) for loop. For and while loop is entry-controlled loops. Do-while is an exit-controlled loop.

What is the advantage of for loop?

Like all loops, “for loops” execute blocks of code over and over again. The advantage to a for loop is we know exactly how many times the loop will execute before the loop starts.

Which is true of do loop?

The do while loop checks the condition at the end of the loop. This means that the statements inside the loop body will be executed at least once even if the condition is never true. The do while loop is an exit controlled loop, where even if the test condition is false, the loop body will be executed at least once.

Can you put a for loop in a while loop?

All for loops can be written as while loops, and vice-versa. Just use whichever loop seems more appropriate to the task at hand. In general, you should use a for loop when you know how many times the loop should run.

How do you use a while loop in Python?

In Python, While Loops is used to execute a block of statements repeatedly until a given condition is satisfied. And when the condition becomes false, the line immediately after the loop in the program is executed. While loop falls under the category of indefinite iteration.

What happens in a while loop?

In while loop, condition is evaluated first and if it returns true then the statements inside while loop execute, this happens repeatedly until the condition returns false. When condition returns false, the control comes out of loop and jumps to the next statement in the program after while loop.

How does a for loop work?

After the body of the ‘for’ loop executes, the flow of control jumps back up to the increment statement. … If it is true, the loop executes and the process repeats itself (body of loop, then increment step, and then again condition). After the condition becomes false, the ‘for’ loop terminates.

Why while loop is better than for loop?

A do/while loop will always execute the code in the do{} block first and then evaluate the condition. do { //gets executed at least once } while (condition); A for loop allows you to initiate a counter variable, a check condition, and a way to increment your counter all in one line.

How do you write a while loop?

How while loop works?The while loop evaluates the test expression inside the parenthesis () .If the test expression is true, statements inside the body of while loop are executed. … The process goes on until the test expression is evaluated to false.If the test expression is false, the loop terminates (ends).