I am trying to subtract two variables which are in another variable and every time i try there is an error saying "Warning: A non-numeric value encountered". I can do multiplication, addition and even divide the variables but somehow subtraction is giving an error. Below is the code.
$first = 2; $second = 4; $answer.='<p>The answer is '.$first - $second.'</p> '; echo $answer;
Subtract both values into one variable before. You can then echo that one.
$first = 2; $second = 4; $result = $first - $second; $answer.='<p>The answer is '.$result.'</p> '; echo $answer;
Or put () around the calculation if you want to do it quick and dirty:
$answer.='<p>The answer is '.($first - $second).'</p> ';
echo '<p>The answer is '. ($first - $second) .'</p> '; //Output "The answer is -2"
Just set parentheses
() arround your calculation.
<?php $first = 2; $second = 4; $answer.='<p>The answer is '.($first - $second).'</p> '; echo $answer;
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