Solved

while loop question

Posted on 2015-02-10
7
96 Views
Last Modified: 2015-02-11
I need to run a a chunk of code for 50 times.

Then increment a variable by 50 in that code and run it again and each time add another 50 to the variable until I have run the code a total of 3500 times.
0
Comment
Question by:austinfx
  • 3
  • 3
7 Comments
 
LVL 83

Expert Comment

by:Dave Baldwin
ID: 40602233
Typically that is done with a 'for' loop because a 'for' is done by the count.  A 'while' can too but the logic for the count is part of the 'for' loop.  http://php.net/manual/en/control-structures.for.php
0
 

Author Comment

by:austinfx
ID: 40602247
With my question using the information can you show me an example?
0
 
LVL 83

Accepted Solution

by:
Dave Baldwin earned 333 total points
ID: 40602256
The simplest way is to put a loop inside a loop.  Since 3500 / 50 = 70...
<?php
$x = 0;
for ($i = 1; $i <= 70; $i++) {
  for ($j = 1; $j <= 50; $j++) {
    echo $j;  // do something here
  }
$x = $x+50;
}
?>

Open in new window

0
Master Your Team's Linux and Cloud Stack!

The average business loses $13.5M per year to ineffective training (per 1,000 employees). Keep ahead of the competition and combine in-person quality with online cost and flexibility by training with Linux Academy.

 

Author Comment

by:austinfx
ID: 40602260
;)
This looks so intimidating. I'm having trouble understanding it. I know I'm very basic.
0
 
LVL 10

Assisted Solution

by:Jeffrey Dake
Jeffrey Dake earned 167 total points
ID: 40602348
X is your variable that you are adding 50 to.

The loop in defining a counter (I) that starts at the value 1. Every time the loop is executed the value of I will be incremented by 1. This is what the I++ is doing.  the middle section of the for loop line is defining how many times the loop will run. So the above will keep looping while I is less than or equal to 70. If you wanted the loop to run 3500 times you would change that number. Hope that helps.
0
 
LVL 83

Assisted Solution

by:Dave Baldwin
Dave Baldwin earned 333 total points
ID: 40602414
The inner loop runs 50 times each time.  The outer loop runs 70 time and each time it runs, it runs the inner loop.  70 x 50 = 3500.  $x is there only because you wanted to add 50 to something each time the inner ran.
0
 

Author Closing Comment

by:austinfx
ID: 40603774
That was it thank you all for being so informative!
0

Featured Post

The Eight Noble Truths of Backup and Recovery

How can IT departments tackle the challenges of a Big Data world? This white paper provides a roadmap to success and helps companies ensure that all their data is safe and secure, no matter if it resides on-premise with physical or virtual machines or in the cloud.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Generating table dynamically is the most common issue faced by php developers.... So it seems there is a need of an article that explains the basic concept of generating tables dynamically. It just requires a basic knowledge of html and little maths…
Author Note: Since this E-E article was originally written, years ago, formal testing has come into common use in the world of PHP.  PHPUnit (http://en.wikipedia.org/wiki/PHPUnit) and similar technologies have enjoyed wide adoption, making it possib…
Learn how to match and substitute tagged data using PHP regular expressions. Demonstrated on Windows 7, but also applies to other operating systems. Demonstrated technique applies to PHP (all versions) and Firefox, but very similar techniques will w…
The viewer will learn how to create and use a small PHP class to apply a watermark to an image. This video shows the viewer the setup for the PHP watermark as well as important coding language. Continue to Part 2 to learn the core code used in creat…

777 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question