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12th Standard Computer Applications English Medium - Looping Structure 3 Mark Book Back Question Paper and Answer Key 2022 - 2023

Published on: 05/09/2022

QB365 provides a detailed and simple solution for every Possible Book Back Questions in Class 12 Computer Applications Subject -Looping Structure, English Medium. It will help Students to get more practice questions, Students can Practice these question papers in addition to score best marks.

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Questions:

Generic 3

5 x 3 = 15

Differentiate While and Do while loops.

Write short notes on Do while Loop.

Differentiate For each and While loop.

Write the purpose of Looping Structure in PHP

Write the features Looping Structure.

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Answers Key:

Generic 3

5 x 3 = 15

While loop	Do while loop
(i) It is important feature which is used for simple iteration logics.	(i) It always run the statement inside of the loop block at the first time execution.
(ii) It is Entry controlled loop	(ii) It is exit controlled loop
(iii) It checks the condition, and executes the loop if specified condition is true.	(iii) It checks the condition, and then repeats the loop as long as the specified condition is true.
Syntax : While(condition) { code to be executed; }	Syntax : do { code to be executed; } while (condition is true);

1. Do whileloop always run the statement inside of the loop block at the first time execution.
2. Then it is checking the condition whether true or false.
3. It executes the loop, if the specified condition is true.
Syntax:
do
{code to executed;
}while (condition is true);

For each loop	While loop
(i) It provides an easy way to iterate over arrays.	(i) It is used for simple iteration logics.
(ii) Loop iteration depends on each KEY value pair in the Array	(ii) It executes block of code while the specified condition is true.
(iii) Syntax: for each (Sarray as $value) { code to be executed; }	(iii) Syntax: while (condition is true) { code to be executed; }

1. In Programming, the looping structure is often necessary to repeat the same block of code for a given number of times, until a certain condition is met.
2. Loop properties easy way to iterate over arrays.
3. Loop structure needed when we want to run block of code again and again.

(i) PHP Loop Often when you write code, you want the same block of code to run over and over again in a row.
(ii) Instead of adding several almost equal code-lines in a script, we can use loops to perform a task.
(iii) Looping structures are useful for writing iteration logics.
(iv) It is the most important feature of many programming languages, including PHP.