#include "libft.h"
/*
* ft_isalnum() function that checks if a character is alphabetic or digit.
* Returns 1 if c is a letter (uppercase or lowercase) or digit, 0 otherwise.
*/
int ft_isalnum(int c)
{
return ((c >= 48 && c <= 57)
|| (c >= 65 && c <= 90)
|| (c >= 97 && c <= 122));
}