Why echo $people[1] gives an error ?

Question

It shows error on output
Its an associative array
<?php>
$people= array("david"=>"21","amy"=>"29");
Echo $people[1];
?>
Op: error

Answer 1

The values have their own defined keys, so they don't "answer" to numeric keys.
Johann Ditrich has linked to the lesson:
https://www.sololearn.com/learn/PHP/1808/

Answer 2

Try
echo $people['amy'];
because it's an associav and not a numeric array.
So the keys in your example are 'david' and 'amy'.
https://www.sololearn.com/learn/PHP/1808/