C while loops statement allows to repeatedly run the same block of code until a condition is met. while loop is a most basic loop in C programming. while loop has one control condition, and executes as long the condition is true.

How does a while loop work?

Overview. A do while loop is a control flow statement that executes a block of code at least once, and then repeatedly executes the block, or not, depending on a given boolean condition at the end of the block. Some languages may use a different naming convention for this type of loop.

How while loop works step by step?


  1. The program executes.
  2. A while loop is found in the program.
  3. The condition specified in the while loop is evaluated to check whether it is true or false.
  4. If the condition is true, the statements in the loop are executed.
  5. The condition is checked again once the statements in the loop have run.

Do while loop in C with example?

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

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

What happens in 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.

Why do we use while loop in C?

In general, a while loop allows a part of the code to be executed multiple times depending upon a given boolean condition. It can be viewed as a repeating if statement. The while loop is mostly used in the case where the number of iterations is not known in advance.

Why would you use a while loop?

The while loop in Python is used to iterate over a block of code as long as the test expression (condition) is true. We generally use this loop when we don’t know the number of times to iterate beforehand.

What are the three steps in writing a while loop?

Remember these 3 steps to writing a loop:

  1. Initialize the loop variable (before the while loop)
  2. Test the loop variable (in the loop header)
  3. Change the loop variable (in the while loop body at the end)

What is loop explain while loop?

In most computer programming languages, 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.

How do you write a while?

Awhile Definition

Awhile, written as one word, is an adverb, and it means “for a period of time.” Basically, awhile equals for plus a while.

What is the syntax for 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. In some cases, we have to execute a body of the loop at least once even if the condition is false.

What is a do-while loop example in real life?

Real World Example, Go to the bath room: DO { Check_Door_Lock(); } WHILE (WAIT_WHILE_DOOR_IS_LOCKED()); after the loop is done then the WAIT_WHILE_DOOR_IS_LOCKED() has returned a false value, so it isn’t locked anymore, thus, the whole loop ends.

Which executes first in a do-while loop?


(The braces are not required if only ONE statement is used in the body of the loop.) The do-while loop is an exit-condition loop. This means that the body of the loop is always executed first.

Which loop is faster in C language?

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

When and for what condition does the do-while loop terminate?

The test of the termination condition is made after each execution of the loop; therefore, a do-while loop executes one or more times, depending on the value of the termination expression. The do-while statement can also terminate when a break, goto, or return statement is executed within the statement body.

Do-while loop is guaranteed to be execute at least once?

while loop is similar to a while loop, except that a do… while loop is guaranteed to execute at least one time.

How many loops are there in C?

C programming has three types of loops: for loop.

Which loop is always executed once?

a do while loop

With a do while loop the condition is not evaluated until the end of the loop. Because of that a do while loop will always execute at least once.

Do while loops terminate when conditional expression returns?

do-while loop terminates when conditional expression returns? Explanation: zero indicate False which terminate the loop .

At which value do-while loop terminates?

Discussion Forum

Que. do-while loop terminates when conditional expression returns?
b. Zero
c. Non – zero
d. None of the above

Do-while loop is an control loop Mcq?

do-while loop is an _____ control loop ? Explanation: The do-while loop is an exit control loop which means that it first enters the loop, executes the statements, and then checks the condition.

How many times is a do-while loop guaranteed to loop?

Answer: Do while loop will execute at least one time.

How many times do while loop runs?

There is no fixed answer to how many times the while loop is executed. The while loop is always executed when there is a carry bit from one position to another.

What is the minimum number of times a Do While loop is executed?

In the do-while loop, the conditional test is performed at the bottom of the loop. Therefore, even if the condition is false before entering the do-while loop, the body of the loop is executed at least once. That’s why the minimum number of iterations of a do-while loop is 1.

How does a while loop start Mcq?

Explanation: WHILE LOOP is repeated until a condition no longer holds. The condition is first tested and if it is found to be true then the loop iteration starts. With the end of iteration, the condition is again tested and the process continues until the condition is not false. 7.

How does a for loop start?

The For Loop

Statement 1 is executed (one time) before the execution of the code block. Statement 2 defines the condition for executing the code block. Statement 3 is executed (every time) after the code block has been executed.

Do While is entry control loop?

for loop and while loop are the examples of Entry Controlled Loop. do while loop is the example of Exit controlled loop. Entry Controlled Loops are used when checking of test condition is mandatory before executing loop body.