Function Name	Short Description
ft_isalpha	Checks if character is alphabetic
ft_isdigit	Checks if character is a digit
ft_isalnum	Checks if character is alphanumeric
ft_isascii	Checks if character is in ASCII table
ft_isprint	Checks if character is printable
ft_strlen	Calculates string length
ft_memset	Fills memory with a constant byte
ft_bzero	Fills memory with zero bytes
ft_memcpy	Copies memory area
ft_memmove	Copies memory area safely (handles overlap)
ft_strlcpy	Copies string with size limitation
ft_strlcat	Concatenates string with size limitation
ft_toupper	Converts character to uppercase
ft_tolower	Converts character to lowercase
ft_strchr	Locates first occurrence of character in string
ft_strrchr	Locates last occurrence of character in string
ft_strncmp	Compares two strings up to n characters
ft_memchr	Locates byte in memory area
ft_memcmp	Compares memory areas
ft_strnstr	Locates substring in string with length limitation
ft_atoi	Converts string to integer
ft_calloc	Allocates and zeros memory
ft_strdup	Creates duplicate of string using malloc
ft_substr	Creates substring from string
ft_strjoin	Concatenates two strings
ft_strtrim	Trims specified characters from string
ft_split	Splits string using delimiter character
ft_itoa	Converts integer to string
ft_strmapi	Applies function to each character with index
ft_striteri	Applies function to each character with index (void)
ft_putchar_fd	Outputs character to file descriptor
ft_putstr_fd	Outputs string to file descriptor
ft_putendl_fd	Outputs string with newline to file descriptor
ft_putnbr_fd	Outputs integer to file descriptor