php – Enter a number and display the next 100 even numbers. Help

I'm new to php, I make a program that receives any number and displays the next 100 even numbers. However, I open the site, it already displays a result without entering anything.

Exercise 3








Calculate the calculation


Result:

<? php $ number = $ _GET['numero']; C = 0; while ($ c <= 100) { if ($numero % 2 == 0) { echo "$numero "; } $numero++; $c++; } ?>