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.
What is the purpose of do while loop in PHP explain with example?
The PHP do… while Loop. The do… while loop will always execute the block of code once, it will then check the condition, and repeat the loop while the specified condition is true.
What is the purpose of the while () method?
The while loop is used to repeat a section of code an unknown number of times until a specific condition is met. For example, say we want to know how many times a given number can be divided by 2 before it is less than or equal to 1.
How do you do a while loop in PHP?
The while loop executes a block of code repeatedly until the condition is FALSE. Once the condition gets FALSE, it exits from the body of loop. It should be used if the number of iterations is not known.
- <? php.
- echo “$n<br/>”;
What is the difference between while and do while loop in PHP?
Key Differences Between while and do-while Loop
The while loop checks the condition at the starting of the loop and if the condition is satisfied statement inside the loop, is executed. As against, in the do-while loop, the condition is checked after the execution of all statements in the body of the loop.
What is while loop example?
Example 1: while loop
When i = 1 , the test expression i <= 5 is true. Hence, the body of the while loop is executed. … Now, i = 2 , the test expression i <= 5 is again true. The body of the while loop is executed again.
What is difference between while and do while?
The difference lies in the place where the condition is tested. The while loop tests the condition before executing any of the statements within the while loop whereas the do-while loop tests the condition after the statements have been executed within the loop.
Which loop is guaranteed to execute at least one time?
The only loop that will always get executed is the do while loop. As far as the do while loop is considered then the condition is not evaluated until you reach the end of a loop. Because of this nature of it a do while loop will always get executed at least once.
How do while loops work?
How while Loop works? 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 many times while loop will be executed?
The main difference between the two is the while loop may execute zero times if the condition is initially false, the repeat-until loop always executes at least once.
What loop means?
(Entry 1 of 3) 1a : a curving or doubling of a line so as to form a closed or partly open curve within itself through which another line can be passed or into which a hook may be hooked. b : such a fold of cord or ribbon serving as an ornament. 2a : something shaped like or suggestive of a loop.
How do I stop a while loop in PHP?
The keyword break ends execution of the current for, foreach, while, do while or switch structure. When the keyword break executed inside a loop the control automatically passes to the first statement outside the loop.
What is the difference between for loop and do-while loop?
Unlike a while loop, a for statement consumes the initialization, condition and increment/decrement in one line thereby providing a shorter, easy to debug structure of looping.
Here is the difference table:
|For loop||Do-While loop|
|for loop is entry controlled loop.||do-while is exit controlled loop.|
What is difference between while and do-while loop explain with example?
do-while loop: 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 the difference between while loop and do-while loop in C?
While loop is executed only when given condition is true. Whereas, do-while loop is executed for first time irrespective of the condition.