Handle the edge case of the smallest possible integer ( -2147483648 ), which can't be made positive due to signed overflow. Use recursion or arrays to reverse the digits.

Think about what happens when your function receives weird inputs. What if the string is empty? What if the number is negative or zero?

Using unauthorized standard library functions (like printf or string.h ) will automatically fail your assignment. Stick strictly to write .

It’s a "feature" designed to strip away your dependencies and prove you actually understand how data moves from a variable to the screen.

ayoub0x1/C-Piscine-exam: Get ready for your 1337 ... - GitHub

Expect problems that ask you to compare numbers, find the maximum or minimum in a set, or determine if a number is prime. These tests evaluate your ability to translate logical requirements into efficient code using if-else statements and loops. The Importance of Norminette

You must understand how to write characters to the standard output using the allowed system calls, primarily write . Mastery of ft_putchar Converting integers to ASCII characters 2. Pointers and Memory Addresses

If your code fails a level, you cannot move forward. You must fix the problem, re-submit, and pass it before the system generates a new task.