1에서
Warning: Undefined variable $GET in /users/2021/i2151047/public_html/2022/WebProg/ch08/exam08-05.php on line 16

Warning: Trying to access array offset on null in /users/2021/i2151047/public_html/2022/WebProg/ch08/exam08-05.php on line 16
까지 자연수의 합은
Warning: Undefined variable $GET in /users/2021/i2151047/public_html/2022/WebProg/ch08/exam08-05.php on line 17

Warning: Trying to access array offset on null in /users/2021/i2151047/public_html/2022/WebProg/ch08/exam08-05.php on line 17

Fatal error: Uncaught Error: Undefined constant "i" in /users/2021/i2151047/public_html/2022/WebProg/ch08/exam08-05.php:10 Stack trace: #0 /users/2021/i2151047/public_html/2022/WebProg/ch08/exam08-05.php(17): sum() #1 {main} thrown in /users/2021/i2151047/public_html/2022/WebProg/ch08/exam08-05.php on line 10