Why an extra number with WHILE function results?

[menre]

Hello Folks,

I used a piece of code to test the square root of some numbers in a JAVA application using 'DO' 'WHILE' functions and everything worked well. So, I decided to do the same thing using PHP. I have tried both the 'WHILE' and 'DO WHILE' functions in PHP. They both work fine except that I get an extra number. Could someone have a look at my code and see what I am doing wrong, please?

 <?php 
 $i = 1;

 while($i <=5){
	echo "The square root of " .$i." is " .$i*$i ."<br/>";
	$i++;
 }
 echo $i;
 ?>

When I run the code above, I get the output below.

The square root of 1 is 1
The square root of 2 is 4
The square root of 3 is 9
The square root of 4 is 16
The square root of 5 is 25
6

Why do I get 6 which is an extra number added to it?

Any help will be much appreciated.

[kfcSmitty]

Because that is what you told the program to do.

You go through your while loop incrementing $i every iteration. When $i = 6, then your while condition is false and it exits the loop. Once you exit the loop, you've echoed $i again which, at this point, is now 6.

[menre]

Hi,

Thanks for your response to my message. I got your explanations. But how do I get around this problem now? Any solution, please?

Thanks,
Menre

[kfcSmitty]

If you understood the explanation, you should have been able to fix the problem...

To fix it, remove this line:

echo $i;

So your code becomes

<?php 
 $i = 1;

 while($i <=5){
	echo "The square root of " .$i." is " .$i*$i ."<br/>";
	$i++;
 }
 ?>

[menre]

Thanks a lot.
Menre