Why get error ?

Question

<?php
$str = "10"
$int = 20;
$sum = "$str + $int">
echo ($sum);
?>

Answer 1

Make following changes
<?php
$str = "10"; //Missed semi-colon
$int = 20;

$sum = "$str + $int"; //1. another typo > instead of ;
//2. will result into 10 + 20. Remove quotes to get actual sum

echo ($sum);
?>

Answer 2

<?php
$str = "10";
$int = 20;
$sum = "$str + $int";
echo ($sum);
?>

Answer 3

thanks I got it .