Contrast with the while loop, which tests the condition before the code within the block is executed, the do-while loop is an exit-condition loop. This means that the code must always be executed first and then the expression or test condition is evaluated. If it is true, the code executes the body of the loop again.
How does a do-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.
What is do-while loop with example?
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. An example of such a scenario would be when you want to exit your program depending on the user input.
Which of the following is true about a do-while loop?
In a do-while loop, the body of the loop is first executed then the condition is checked for the next iteration; if the condition is true, then the body of the loop is executed again. If the condition is not true then the next iteration does not happen.
What is while and 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. While loop statement(s) is executed zero times if the condition is false whereas do while statement is executed at least once.
What is the initial statement in the following for loop?
Syntax of a For Loop
The initialization statement describes the starting point of the loop, where the loop variable is initialized with a starting value. A loop variable or counter is simply a variable that controls the flow of the loop. The test expression is the condition until when the loop is repeated.
How does while loop start?
The while loop starts by evaluating the condition. If the condition is true, the statement(s) is/are executed. If the condition is false, the statement(s) is/are not executed. After that, while loop ends.
How do you end a while loop?
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.
Do while loops syntax?
The syntax is: do { statements } while (condition); Here’s what it does. First, the statements are executed, then the condition is tested; if it is true , then the entire loop is executed again.
Do while loops w3?
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.
Do while loop explanation in C?
The C do while statement creates a structured loop that executes as long as a specified condition is true at the end of each pass through the loop. The syntax for a do while statement is: If the value of the expression is “false” (i.e., compares equal to zero) the loop is exited.
Which of the following best describes a while loop?
Which of the following best describes a while loop? -A loop that contains a counter in parenthesis with the conditional statement. -A loop that contains a segment of code that is executed before the conditional statement is tested.
Which statement is not true about Do While loop?
Which statement is NOT true about do-while loops. The number of times a do-while loop is executed is dependent upon the value of the counter variable.
Do While loop checks the condition at the bottom of the loop?
while loop in C. Unlike for and while loops, which test the loop condition at the top of the loop, the do while loop in C programming checks its condition at the bottom of the loop.
Why we use do while loop?
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.
Is do while loop and while loop are same?
do while loop is similar to while loop with the only difference that it checks for the condition after executing the statements, and therefore is an example of Exit Control Loop.
What is do while loop in PHP?
The PHP do-while loop is used to execute a set of code of the program several times. If you have to execute the loop at least once and the number of iterations is not even fixed, it is recommended to use the do-while loop.
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