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If and elseif and else syntax

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Join Date: Jun 2009

Posts: 38

Reputation: Jintu is an unknown quantity at this point

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Jintu

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If and elseif and else syntax

Jul 8th, 2009

Hello all,

I have to write a program that calculate a bmi of person whose weight is 170 pounds (it increases by 1 pound for each month for 12 months) and 70 inches, after I have all the bmi for each weight from 170 - 182 pounds, under each weight I need to indicate if his bmi is underweight, normal, overweight or obese. I have written the program using php script, but it does not seem to work correctly, could anyone shed some light on this. The program code is:

 Help with Code Tags 
 php Syntax (Toggle Plain Text) 
 <html>
<head>
<title>Lab 10a</title>
</head>
<body>
<?php
$pounds = 170;
$inches = 70;
$increase = 0;
$poundsinch = 703;
while ($increase < 13)
	{
	$division = ($pounds) / ($inches * $inches) * ($poundsinch);
	echo "The BMI of $pounds pounds and $inches inches is : ".$division."<br />";
	echo " ";
	$increase = $increase + 1;
	$pounds = $pounds + 1;
	if ($division < 18.5)
	  echo "You are underweight";
	elseif ($division < 25){
	  echo "Your BMI is normal";
	elseif ($division < 29.9)
	  echo "You are overweight";
	else{
	  echo "You are obese";
 
	}
 
 
 
?>
 
</body>
</html>
 <html>
<head>
<title>Lab 10a</title>
</head>
<body>
<?php
$pounds = 170;
$inches = 70;
$increase = 0;
$poundsinch = 703;
while ($increase < 13)
	{
	$division = ($pounds) / ($inches * $inches) * ($poundsinch);
	echo "The BMI of $pounds pounds and $inches inches is : ".$division."<br />";
	echo " ";
	$increase = $increase + 1;
	$pounds = $pounds + 1;
	if ($division < 18.5)
	  echo "You are underweight";
	elseif ($division < 25){
	  echo "Your BMI is normal";
	elseif ($division < 29.9)
	  echo "You are overweight";
	else{
	  echo "You are obese";
	
	}

	
	  
?>

</body>
</html>

Thanks in advance,
Tony

Last edited by peter_budo; Jul 10th, 2009 at 6:41 am. Reason: Keep It Organized - For easy readability, always wrap programming code within posts in [code] (code blocks) and [icode] (inline code) tags.

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Join Date: Mar 2008

Posts: 152

Reputation: kireol is an unknown quantity at this point

Solved Threads: 19

kireol

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Junior Poster

Re: If and elseif and else syntax

Jul 8th, 2009

I assume this is homework.

Part of learning to program is to put a bit more thought into things.

Not so good: It's not working. It doesnt work right. It's broke.

Good: I was expecting to see X and I see Y. What is the command to ____.

When you start to think this way, and post this way, your errors will sometimes become apparent to you, and you won't need as much help.

Last edited by kireol; Jul 8th, 2009 at 10:43 pm.

Why do Daniweb moderators edit CODE tags into CODE=style but don't check "solved".

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Join Date: Oct 2005

Posts: 51

Reputation: tom curren is an unknown quantity at this point

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tom curren tom curren is offline

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Re: If and elseif and else syntax

Jul 8th, 2009

Oh great. Now I have to google BMI and wade through corporate references or risk watching my intelligence decline.

Got it... BMI

Awful lot of science for something that within 15% is irrelevant.

Spending two seconds and only reading up to the first line of interest, the calculation of $DIVISION, I would start with looking up operator precedence in PHP and probably adding some parens.

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Join Date: Oct 2005

Posts: 51

Reputation: tom curren is an unknown quantity at this point

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tom curren tom curren is offline

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Re: If and elseif and else syntax

Jul 8th, 2009

oh yes, and for heaven's sake, indent your code.

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Join Date: Aug 2007

Posts: 165

Reputation: Fest3er is an unknown quantity at this point

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Fest3er

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Junior Poster

Re: If and elseif and else syntax

Jul 9th, 2009

To provide a useful answer:

use [code] and [/code] tags around your code so it is displayed on the forum in a readable fashion
use the "Preview Post" button to review your post before submitting it
be sure your code is properly indented
always use {} pairs around code blocks (while loops, if/else statements, etc.) even if there is only one statement in the block
verify that the braces are properly paired.

Your braces are neither balanced nor paired.

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Join Date: Jan 2008

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Reputation: jcacquiescent27 is an unknown quantity at this point

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jcacquiescent27 jcacquiescent27 is offline

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Re: If and elseif and else syntax

Jul 9th, 2009

This is simply a matter of missing curly braces. Your script works as expected once they are all in there. Following Fest3er's advice will get you far.

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Join Date: Jan 2008

Posts: 16

Reputation: dalefish is an unknown quantity at this point

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dalefish

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Newbie Poster

Re: If and elseif and else syntax

Jul 9th, 2009

As was stated above, the clearer the question, ther clearer that answer. However, thought I'd help the lad/ladette out....

 Help with Code Tags 
 php Syntax (Toggle Plain Text) 
<?php
$pounds = 170;
$inches = 70;
$increase = 0;
$poundsinch = 703;
while ($increase < 13){
	$division = number_format(($pounds) / ($inches * $inches) * ($poundsinch),2);
	echo "The BMI of $pounds pounds and $inches inches is : ".$division." ";
	if ($division < 18.5){
		echo "You are underweight.<br />";
		}
	elseif ($division < 25){
		echo "Your BMI is normal.<br />";
		}
	elseif ($division < 29.9){
		echo "You are overweight.<br />";
		}
	else{
		echo "You are obese.<br />";
		}
	$increase++;
	$pounds++;
	}
?>
<?php
$pounds = 170;
$inches = 70;
$increase = 0;
$poundsinch = 703;
while ($increase < 13){
	$division = number_format(($pounds) / ($inches * $inches) * ($poundsinch),2);
	echo "The BMI of $pounds pounds and $inches inches is : ".$division." ";
	if ($division < 18.5){
		echo "You are underweight.<br />";
		}
	elseif ($division < 25){
		echo "Your BMI is normal.<br />";
		}
	elseif ($division < 29.9){
		echo "You are overweight.<br />";
		}
	else{
		echo "You are obese.<br />";
		}
	$increase++;
	$pounds++;
	}
?>