Day 2 - Variables - Become PHP Expert in 30 days

[admin]

Doubt 1
Is it possible to use same variable name for multiple values ?

Variables can store only 1 value at a time. If you store new value to a variable, value of variable changes to that new value.

Doubt 2
Is variable name is case sensitive ?

I mean both the following variables will give different values in the same script ?

Variables are case sensitive.

[image]

DAY 2 PHP PROGRAMMING

http://php.flashwebhost.com/tom/day_2_variables_6.php

<?php


$computerPrice = '20000' ;
$printerPrice = '5000' ;
$discount = 0.1; // 10% discount.


echo ' Total cost = Rs: ' . ($computerPrice+$printerPrice) . ' /- ' ;
echo '<br>' ; 
echo ' Price after discount = Rs: ' . ( ($computerPrice + $printerPrice) -  (($computerPrice + $printerPrice) *  $discount)) . '/-' ;

[image]

DAY 2 PHP PROGRAMMING

http://php.flashwebhost.com/tom/day_2_variables_7.php

<?php


$computerPrice = 20000 ;
$printerPrice = 5000 ;
$discount = 0.2 ; // 20% discount.
$totalCost = $computerPrice + $printerPrice ;


echo ' Total cost = Rs: ' . $totalCost . '/-' ;


echo '<br>' ;


echo ' Price after discount = Rs. ' . ($totalCost - ($totalCost * $discount )) . '/-' ;

[Vahaa11]

I just tried with $discount = 0.1 , $discount = 0.2.

But when i add $discount = 12 , the result was wrong.

So i searched in google for "percentage formula in php" and i got the following

<?php$shirt_price = 300;$pant_price = 300;$discount = 12;$total_cost = ($shirt_price+$pant_price);
echo 'Total price is Rs :  ' . $total_cost . '/-';
echo '<br>';
echo ' Price after discount is Rs : ' . ($total_cost - ($total_cost*$discount / 100)). '/-';

See the result at http://php.flashwebhost.com/sibichan...ariables_7.php

[vineesh]

DAY 2 PROGRAMMING:

http://php.flashwebhost.com/vineesh/...ariables_6.php

Seems it worked :). My code is:

<?php


$costOfApple = 50;
$costOfOrange = 30;
$discount = 0.5; // 50% discount.


echo 'Cost of an apple = ' . $costOfApple . '<br>' . 'Cost of Orange = ' . $costOfOrange . '<br>';
echo 'Cost of apple + Orange = ' . ($costOfApple + $costOfOrange) . '<br>';
echo 'Discount ' . $discount . '<br>' ;
echo 'Cost after discount = ' . ( ($costOfApple + $costOfOrange) - (($costOfApple + $costOfOrange) * $discount ) ) . '/-';

[vineesh]

DAY 2 PROGRAMMING .

http://php.flashwebhost.com/vineesh/...ariables_7.php

Code

<?php

$costOfApple = 100;
$costOfOrange = 70;
$totalCost = $costOfApple + $costOfOrange;
$discount = 0.2;


echo 'Cost of Apple = Rs. ' . $costOfApple . ' /- <br>';
echo 'Cost of Orange = Rs. ' . $costOfOrange . '/- <br>';
echo 'Total Cost = Rs. ' . $totalCost . '/- <br>';
echo 'Discount = Rs. ' . $totalCost * $discount . '/-  <br>' ;
echo 'Cost after discount = Rs. ' . ( ( $totalCost ) - ( ($totalCost) * $discount )) . '/- <br>';