while c++ loop

How does a while loop work in C?

Summary

• Define loop in C: A Loop is one of the key concepts on any Programming language. ...
• A block of loop control statements in C are executed for number of times until the condition becomes false.
• Loops in C programming are of 2 types: entry-controlled and exit-controlled.

More items...

How to break out of a while loop in C?

• Simple loops: Consider the situation where we want to search an element in an array. ...
• Nested Loops: We can also use break statement while working with nested loops. ...
• Infinite Loops: break statement can be included in an infinite loop with a condition in order to terminate the execution of the infinite loop. ...

How to use while loops in C programming?

• Variable initialization, and then it enters the Do While loop.
• Execute/Run a group of statements within the C Programming loop.
• Next, use Increment and Decrement Operator inside the loop to increment or decrements the values.
• Next, it checks the while condition. ...
• If it is False, compiler exits from the loop.

What is while loop in C programming?

Properties of while loop

• A conditional expression is used to check the condition. ...
• The condition will be true if it returns 0. ...
• In while loop, the condition expression is compulsory.
• Running a while loop without a body is possible.
• We can have more than one conditional expression in while loop.
• If the loop body contains only one statement, then the braces are optional.

What is the while loop in C?

The do/while loop is a variant of the while loop. This loop will execute the code block once, before checking if the condition is true, then it will repeat the loop as long as the condition is true.

What is while loop and for loop in C?

For Loop and While Loop is entry-controlled loops. Exit Controlled Loops: In this type of loop the test condition is tested or evaluated at the end of the loop body. Therefore, the loop body will execute at least once, irrespective of whether the test condition is true or false.

Are there while loops in C?

A while loop in C programming repeatedly executes a target statement as long as a given condition is true.

What is while loop example?

A "While" Loop is used to repeat a specific block of code an unknown number of times, until a condition is met. For example, if we want to ask a user for a number between 1 and 10, we don't know how many times the user may enter a larger number, so we keep asking "while the number is not between 1 and 10".

What is while and for loop?

The 'for' loop used only when we already knew the number of iterations. The 'while' loop used only when the number of iteration are not exactly known. Condition. If the condition is not put up in 'for' loop, then loop iterates infinite times. If the condition is not put up in 'while' loop, it provides compilation error ...

What are the 3 types of loops?

In Java, there are three kinds of loops which are – the for loop, the while loop, and the do-while loop. All these three loop constructs of Java executes a set of repeated statements as long as a specified condition remains true. This particular condition is generally known as loop control.

How does while loop work?

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 do you write a while loop?

About This ArticleIdentify the variables.Write the while command and state the condition.Enter the statements that should run until the condition is no longer true.Choose to add an else statement if you're using Python.

What is a while loop statement?

A while loop is a control flow statement that allows code to be executed repeatedly based on a given Boolean condition. The while loop can be thought of as a repeating if statement.

What is the structure of while loop?

While Loop is a type of loop that is used when you don't know exactly how many times the code will repeat. It's based on a condition, so the instruction inside the while should be either a boolean value (True/False) or an operator that returns a boolean (<,>,==, etc.).

What type of loop is while loop?

It is an entry-controlled loop. In while loop, a condition is evaluated before processing a body of the loop. If a condition is true then and only then the body of a loop is executed.

Which loop is faster in C language?

"Do-While loop is the fastest loop in C programming".

What is the difference between a while loop and a do while loop?

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.

What is loop in C with example?

In programming, a loop is used to repeat a block of code until the specified condition is met. C programming has three types of loops: for loop. while loop.

Why do while loop is used?

Using the do-while loop, we can repeat the execution of several parts of the statements. The do-while loop is mainly used in the case where we need to execute the loop at least once. The do-while loop is mostly used in menu-driven programs where the termination condition depends upon the end user.

What is the syntax of while loop?

Syntax of Do-While Loop in C: do { statements } while (expression); As we saw in a while loop, the body is executed if and only if the condition is true.

Loops

Loops can execute a block of code as long as a specified condition is reached.

While Loop

The while loop loops through a block of code as long as a specified condition is true:

Example 1: Print 1 to 50 using while loop in c

In this c program, we have to print values from 1 2 3 up to 50. See the following program.

Example 2: Print multiples of 5 in C using while loop

In this c program, we have to print the values like 5 10 15 and so on. I am going to make changes in the above program. Change the value of i from 1 to 5 because we need to start printing from 5. Now, instead of i++, write i=i+5. Why? Because, we need to print the multiples of 5. The while condition remains the same. See the following program.

Example 3: Factorial Program in C While Loop

We can calculate factorial of any number using any loop or recursion. Here, we are not going in detail about factorial. If we want to know in detail, then click Factorial Program in C.

What is a while loop?

A while loop statement repeatedly executes a target statement as long as a given condition is true.

What is the key point of a while loop?

Here, key point of the while loop is that the loop might not ever run. When the condition is tested and the result is false, the loop body will be skipped and the first statement after the while loop will be executed.

What is while loop?

While Loop is a type of loop that is used when you don't know exactly how many times the code will repeat. It's based on a condition, so the instruction inside the while should be either a boolean value (True/False) or an operator that returns a boolean (<,>,==, etc.).

Why is a while loop infinite?

The while loop is used when we don't know the number of times it will repeat. If that number is infinite, or the Boolean condition of the loop never gets set to False, then it will run forever. This is why it's an infinite loop. Look at the sample while loop below.

What is infinite loop?

An infinite loop is one that runs forever since the condition is always true. If you find yourself repeating instructions in your code, there is a way that you can avoid that by the use of loops. To unlock this lesson you must be a Study.com Member. Create your account.