diff --git a/Makefile b/Makefile
index 7628f53..3e491e9 100644
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,7 @@
 #    By: whaffman <whaffman@student.codam.nl>         +#+                      #
 #                                                    +#+                       #
 #    Created: 2024/10/10 16:44:36 by whaffman      #+#    #+#                  #
-#    Updated: 2025/02/05 12:43:55 by whaffman      ########   odam.nl          #
+#    Updated: 2025/02/20 15:45:15 by whaffman      ########   odam.nl          #
 #                                                                              #
 # **************************************************************************** #
 
@@ -23,7 +23,9 @@ WARNINGS = -Wall -Wextra -Werror -g -fsanitize=address,undefined
 CFLAGS = $(WARNINGS)
 
 VPATH	= 	src:src/conversion:src/ft_printf:src/list:src/memory:src/output:\
-			src/string:src/get_next_line
+			src/string:src/get_next_line:src/array
+
+SRC_ARRAY = ft_count_arr.c
 
 SRC_CONVERSION  = 	ft_atoi.c ft_itoa.c ft_tolower.c ft_toupper.c \
 
@@ -34,7 +36,7 @@ SRC_STRING =	ft_isalnum.c ft_isalpha.c ft_isascii.c ft_isdigit.c ft_isprint.c \
 				ft_split.c ft_strchr.c ft_strdup.c ft_striteri.c ft_strjoin.c \
 				ft_strlcat.c ft_strlcpy.c ft_strlen.c ft_strmapi.c ft_strncmp.c \
 				ft_strnstr.c ft_strrchr.c ft_strtrim.c ft_substr.c ft_strcmp.c  \
-				ft_count_words.c ft_isspace.c
+				ft_count_words.c ft_isspace.c ft_isdigit_str.c
 
 SRC_LIST = 		ft_lstadd_back.c ft_lstadd_front.c ft_lstclear.c ft_lstdelone.c \
 				ft_lstiter.c ft_lstlast.c ft_lstmap.c ft_lstnew.c ft_lstsize.c
@@ -49,7 +51,8 @@ SRC_FT_PRINTF = ft_isbase.c ft_putnbr_base.c ft_write_str.c parse_placeholder.c
 SRC_GET_NEXT_LINE = get_next_line.c
 
 SOURCES = 	$(SRC_CONVERSION) $(SRC_MEMORY) $(SRC_STRING) \
-			$(SRC_LIST) $(SRC_OUTPUT) $(SRC_FT_PRINTF) $(SRC_GET_NEXT_LINE)
+			$(SRC_LIST) $(SRC_OUTPUT) $(SRC_FT_PRINTF) \
+			$(SRC_GET_NEXT_LINE) $(SRC_ARRAY)
 
 OBJECTS = $(addprefix $(OBJ_DIR)/, $(SOURCES:.c=.o))
 
diff --git a/inc/libft.h b/inc/libft.h
index 5015cbc..57022cd 100644
--- a/inc/libft.h
+++ b/inc/libft.h
@@ -6,7 +6,7 @@
 /*   By: whaffman <whaffman@student.codam.nl>         +#+                     */
 /*                                                   +#+                      */
 /*   Created: 2024/07/06 11:15:10 by whaffman      #+#    #+#                 */
-/*   Updated: 2025/02/05 15:50:56 by whaffman      ########   odam.nl         */
+/*   Updated: 2025/02/20 15:43:33 by whaffman      ########   odam.nl         */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -14,6 +14,9 @@
 # define LIBFT_H
 # include <stddef.h>
 
+# define TRUE 1
+# define FALSE 0
+
 typedef struct s_list
 {
 	void			*content;
@@ -58,6 +61,8 @@ void	ft_putstr_fd(const char *s, int fd);
 void	ft_putendl_fd(const char *s, int fd);
 void	ft_putnbr_fd(const int n, int fd);
 void	ft_free_arr(char **arr);
+int		ft_isdigit_str(char *str);
+int		ft_count_arr(char **arr);
 
 /*
  *  Lists
diff --git a/src/array/ft_count_arr.c b/src/array/ft_count_arr.c
new file mode 100644
index 0000000..c4801ee
--- /dev/null
+++ b/src/array/ft_count_arr.c
@@ -0,0 +1,23 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        ::::::::            */
+/*   ft_count_arr.c                                     :+:    :+:            */
+/*                                                     +:+                    */
+/*   By: whaffman <whaffman@student.codam.nl>         +#+                     */
+/*                                                   +#+                      */
+/*   Created: 2025/02/20 15:42:41 by whaffman      #+#    #+#                 */
+/*   Updated: 2025/02/20 15:43:17 by whaffman      ########   odam.nl         */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft.h"
+
+int	ft_count_arr(char **arr)
+{
+	int	i;
+
+	i = 0;
+	while (arr[i] != NULL)
+		i++;
+	return (i);
+}
diff --git a/src/string/ft_isdigit_str.c b/src/string/ft_isdigit_str.c
new file mode 100644
index 0000000..012c748
--- /dev/null
+++ b/src/string/ft_isdigit_str.c
@@ -0,0 +1,24 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        ::::::::            */
+/*   ft_isdigit_str.c                                   :+:    :+:            */
+/*                                                     +:+                    */
+/*   By: whaffman <whaffman@student.codam.nl>         +#+                     */
+/*                                                   +#+                      */
+/*   Created: 2025/02/20 15:40:24 by whaffman      #+#    #+#                 */
+/*   Updated: 2025/02/20 15:41:00 by whaffman      ########   odam.nl         */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft.h"
+
+int ft_isdigit_str(char *str)
+{
+	while (*str)
+	{
+		if (!ft_isdigit(*str))
+			return (FALSE);
+		str++;
+	}
+	return (TRUE);
+}