While Loop in C++ Programming Language

-

 While Loop in C++ Programming Language

We have discussed about the entry-controlled loop or pre-tested loop previously in our blog posts. These statements or loops are used to repeat a piece of code for a specific number of times as per our program requirement.

We have studied about the for loop already. Today in this blog post we are going to study about the while loop in C++ programming language. And we will look at how this while loop actually works and how we can stop it by making some condition false so that the loop might not run infinitely.

We use while loop in C++ program when the number of iterations is not known in advance and depends on the condition. When we know exactly that how many times a loop should run then we use the for loop instead of while loop.



Basic Syntax Of While Loop in C++ Programming Language



Basic Working Of While Loop In C++ Programming Language

Now we are going to discuss about the basic working of while loop in C++ programming. As we know that while loop is pre-tested loop and we should use it when we dont know that how many times the loop will run.

Basically in while loop first we need a variable that will start and terminate the while loop Based on some given condition like this

int i = 1;

while(i <= 10)

{

//some piece of code

i++;

}

Once we have declared and initialized the variable, after that we set some condition on the basis of which our loop will run and terminate. At the end of while loop before the ending curly brackets of while loop we usually increament the value of that variable so that at some point our loop will stop with respect to the given condition, like in the above given example while loop will run 10 times as variable i has value 1 and when the value of i will become 10 the loop will terminate.


Simple Programming Example Of While Loop In C++ Programming Language 

We are going to look at two example codes in which we have used while loop


In the first coding example we have declared and initialized a variable i with value 1 i.e, int i = 1;

And after  that we have used this variable inside the while loop expression body with in the round brackets i.e, while(i<=10) in this condition we mentioned that this loop should stop when value of i is less or equal to 10 and at  the end of while loop we simply increment the value of i by 1 i.e, i++ which us equal to i = i +1;

So this loop will run or repeat 10 times and after that it will terminate.

Now we are going to look at second while loop coding example.



In the second coding example we simply took two inputs from the user the first one is TableNumber and the Second one is the TableLength. In this program we are generating table of any specific number and  the table would be of some specific number of length. And we are going to achieve this by using while loop.

The TableNumber will indicate the number for which we want to see the table of and the TableLength will decide that the length of table should be to some specific table length i.e if TableNumber = 2 and TableLength = 10 then the while loop will print the table of 2 from 1 to 10

2 * 1 = 2

2 * 2 = 4

2 * 3 = 6

.

.

.

2 * 10 = 20

And in the while loop we simply give the condition, that the loop should run when the value of i is less or equal to the TableLength. 

In this way our program will execute successfully.

Congratulations like always we have successfully executed the while loop program in C++ Programming language.



Comments

Post a Comment

Popular posts from this blog

How to run c project in visual studio community 2022

-
Image
  How to Run C project in Visual Studio Community 2022 Many people think we cannot write c code in the visual studio community. but this is completely not true, yes we can create a C file and run C code in Visual Studio 2022 let us see how we can achieve it. 1) Open Visual Studio 2022  First of all, we are going to open Visual Studio 2022. 2) creating a new project  Then we are going to create a new project by clicking create new project button. 3) choosing a project template: Create a new project window that will appear in front of you. From this window select an empty project template with C++ symbol on it. Then push the next button. 4) configure your project  A new window will appear in front of you with the heading Configure your new project. In this window, you can select your project and solution name. And also the location of your project. then click the Create button. 5) New project created: On clicking the create button a C++ project is go...
Read more

if and if else statement in C++ programming language

-
Image
  If and if-else statements in the C++ programming language In this blog post we will look at the basic working of if and if-else statement in C++ programming language. These if and if-else statements are also referred as conditinal statements in programming languages. But today we will study them under the context of C++ programming. In C++ programming language we use if and if-else to run a specific peace of code under one condition and another peace of code for some different condition. We also refer them as decision statements . Types of if statements in C++ programming language If we talk about types of if statements there are mainly four types 1) if statement 2) if-else statement 3) if else-if ladder statement 4) nested if statements But in this blog post we will cover the if and if-else statements. Syntax of if statement if(condition) {     //code to be executed here     }   Simple if coding example ...
Read more

if and if-else statement in C programming language

-
Image
  If and if-else statements in the C programming language When we start writing a program, if the program is simple, like adding two numbers, or a Hello World program, we don't need any decision-making in such programs.  But as the programs get complicated, they become complex, and we must make decisions. For such programs, we use conditional statements, which help in making decisions. One of the most important conditional statements is 1) if statement 2) if-else statement What is the if condition? It is a conditional statement used in almost every programming language. The if statement executes a piece of code based on a specific condition when it is true. When the condition is true, it executes the code with curly brackets. What is the syntax of if statement  The if statement has a very simple syntax, as shown below if (condition) { //This piece of code will run if the given condition is true } the above line of code tells us that when the conditio...
Read more