diff --git a/src/array.c b/src/array.c
index 30d2a92..c8a21a7 100644
--- a/src/array.c
+++ b/src/array.c
@@ -17,10 +17,6 @@
 #include <string.h>
 #include "array.h"
 
-/**
- * Create a String Array by initializing its structure.
- * @return Returns a new String Array.
- */
 StringArray *create_string_array() {
     StringArray *string_array = malloc(sizeof(StringArray));
     if (string_array == NULL) {
@@ -32,11 +28,6 @@ StringArray *create_string_array() {
     return string_array;
 }
 
-/**
- * Insert a string into the String Array.
- * @param string_array The String Array to insert into.
- * @param string The string to insert into the String Array.
- */
 void insert_string_array(StringArray *string_array, char *string) {
     if (string_array->array == NULL) {
         string_array->array = malloc(2 * sizeof(char *));
@@ -66,11 +57,6 @@ void insert_string_array(StringArray *string_array, char *string) {
     string_array->size++;
 }
 
-/**
- * Delete a string from the String Array.
- * @param string_array The String Array to delete from.
- * @param index The index in the String Array to delete.
- */
 void delete_string_array(StringArray *string_array, int index) {
     if (string_array->array != NULL && string_array->size > 0 && string_array->size > index) {
         for (size_t i = index; i < string_array->size - 1; i++) {
@@ -100,10 +86,6 @@ void delete_string_array(StringArray *string_array, int index) {
     }
 }
 
-/**
- * Free the String Array and all of its strings.
- * @param string_array The String Array to free.
- */
 void free_string_array(StringArray *string_array) {
     for (size_t i = 0; i < string_array->size; i++) {
         if (string_array->array[i] != NULL) {
@@ -122,10 +104,6 @@ void free_string_array(StringArray *string_array) {
     }
 }
 
-/**
- * Create a new Array List.
- * @return Returns the newly created Array List.
- */
 ArrayList *create_array_list() {
     ArrayList *array_list = malloc(sizeof(ArrayList));
     if (array_list == NULL) {
@@ -138,12 +116,6 @@ ArrayList *create_array_list() {
     return array_list;
 }
 
-/**
- * Set a key inside the Array List.
- * @param array_list The Array List to work on.
- * @param key The key to insert/update.
- * @param value The value to insert/update.
- */
 void set_array_list(ArrayList *array_list, char *key, char *value) {
     if (array_list->keys == NULL) {
         array_list->keys = create_string_array();
@@ -165,12 +137,6 @@ void set_array_list(ArrayList *array_list, char *key, char *value) {
     array_list->size++;
 }
 
-/**
- * Get a value based on a key from an Array List.
- * @param array_list The Array List to work on.
- * @param key The key to search for.
- * @return Returns the value if the key is found in the Array List otherwise it returns NULL.
- */
 char *get_array_list(ArrayList *array_list, char *key) {
     if (array_list->keys != NULL) {
         for (size_t i = 0; i < array_list->size; i++) {
@@ -182,11 +148,6 @@ char *get_array_list(ArrayList *array_list, char *key) {
     return NULL;
 }
 
-/**
- * Remove a key from the Array List.
- * @param array_list The Array List to work on.
- * @param key The key to remove.
- */
 void unset_array_list(ArrayList *array_list, char *key) {
     if (array_list->keys != NULL) {
         for (size_t i = 0; i < array_list->size; i++) {
@@ -200,10 +161,6 @@ void unset_array_list(ArrayList *array_list, char *key) {
     }
 }
 
-/**
- * Free all the memory used in the Array List.
- * @param array_list The Array List to free.
- */
 void free_array_list(ArrayList *array_list) {
     if (array_list != NULL) {
         free_string_array(array_list->keys);
diff --git a/src/builtins.c b/src/builtins.c
index 586f82c..142c368 100644
--- a/src/builtins.c
+++ b/src/builtins.c
@@ -21,11 +21,6 @@
 #include "builtins.h"
 #include "console_line.h"
 
-/**
- * Check if the command is a builtin or not.
- * @param command String with the command name to check.
- * @return Returns true if it's a builtin or false otherwise.
- */
 bool is_builtin(char *command) {
     if (strcmp(command, "exit") == 0) {
         return true;
@@ -38,10 +33,6 @@ bool is_builtin(char *command) {
     return false;
 }
 
-/**
- * Run the builtin command.
- * @param args An array of strings containing the arguments to run.
- */
 void run_builtin(StringArray *args) {
     if (strcmp(args->array[0], "exit") == 0) {
         exit_shell(args);
@@ -54,19 +45,11 @@ void run_builtin(StringArray *args) {
     }
 }
 
-/**
- * Exit the shell.
- * @param args The arguments that were used to call exit. This is used to free the memory before exit.
- */
 void exit_shell(StringArray *args) {
     free_string_array(args);
     exit(EXIT_SUCCESS);
 }
 
-/**
- * Change the directory to what the user inputs.
- * @param args The arguments the user input.
- */
 void change_directory(StringArray *args) {
     if (args->size > 2) {
         fprintf(stderr, "Too many arguments!\n");
diff --git a/src/console_line.c b/src/console_line.c
index 6af95c6..042bb07 100644
--- a/src/console_line.c
+++ b/src/console_line.c
@@ -25,18 +25,10 @@
 #include "color.h"
 #include "console_line.h"
 
-/**
- * Remove new line from the end of a string.
- * @param line The string to remove the new line from.
- */
 void remove_new_line(char* line) {
     line[strcspn(line, "\n")] = 0;
 }
 
-/**
- * Get the logged in user's username.
- * @return Returns the logged in user's username.
- */
 char *get_username() {
     struct passwd *pass = NULL;
     pass = getpwuid(getuid());
@@ -47,10 +39,6 @@ char *get_username() {
     return pass->pw_name;
 }
 
-/**
- * Get the hostname of the machine.
- * @return Returns the hostname.
- */
 char *get_hostname() {
     char hostname[HOST_NAME_MAX + 1];
     gethostname(hostname, HOST_NAME_MAX + 1);
@@ -63,10 +51,6 @@ char *get_hostname() {
     return result;
 }
 
-/**
- * Get the current working directory of the shell.
- * @return Returns the current working directory.
- */
 char *get_working_directory() {
     char *cwd = malloc(PATH_MAX * sizeof(char *));
     getcwd(cwd, PATH_MAX);
@@ -77,9 +61,6 @@ char *get_working_directory() {
     return cwd;
 }
 
-/**
- * Print the console line before the user input.
- */
 void print_input_line() {
     char *username = get_username();
     char *hostname = get_hostname();
@@ -95,10 +76,6 @@ void print_input_line() {
     }
 }
 
-/**
- * Get input from the console.
- * @return Returns a string input by the user.
- */
 char *get_console_input() {
     size_t buffer_size = 0;
     char *line = NULL;
diff --git a/src/include/array.h b/src/include/array.h
index 1b046c0..a2b640b 100644
--- a/src/include/array.h
+++ b/src/include/array.h
@@ -17,40 +17,126 @@
 
 #ifndef _MYSHELLIN_ARRAY
 #define _MYSHELLIN_ARRAY
+
+/**
+ * This struct houses a dynamically sized string array.
+ */
 typedef struct {
+    /**
+     * The array.
+     */
     char **array;
+
+    /**
+     * The amount of elements in the array.
+     */
     size_t size;
 } StringArray;
 
+/**
+ * This struct is used to clean up memory on exit.
+ */
 typedef struct {
+    /**
+     * The array of memory to clean.
+     */
     void **array;
+
+    /**
+     * The amount of elements in the array.
+     */
     size_t size;
 } CleanArray;
 
+/**
+ * This struct has an array list with key value pairs based on strings.
+ */
 typedef struct {
+    /**
+     * The keys array.
+     */
     StringArray *keys;
+
+    /**
+     * The values array.
+     */
     StringArray *values;
+
+    /**
+     * The amount of elements in the array list.
+     */
     size_t size;
 } ArrayList;
 
+/**
+ * A global clean array to use on exit.
+ */
 CleanArray clean;
+
+/**
+ * A global variables array used for environment variables and values.
+ */
 ArrayList *variables;
 
+/**
+ * Create a String Array by initializing its structure.
+ * @return Returns a new String Array.
+ */
 StringArray *create_string_array();
 
+/**
+ * Insert a string into the String Array.
+ * @param string_array The String Array to insert into.
+ * @param string The string to insert into the String Array.
+ */
 void insert_string_array(StringArray *string_array, char *string);
 
+/**
+ * Delete a string from the String Array.
+ * @param string_array The String Array to delete from.
+ * @param index The index in the String Array to delete.
+ */
 void delete_string_array(StringArray *string_array, int index);
 
+/**
+ * Free the String Array and all of its strings.
+ * @param string_array The String Array to free.
+ */
 void free_string_array(StringArray *string_array);
 
+/**
+ * Create a new Array List.
+ * @return Returns the newly created Array List.
+ */
 ArrayList *create_array_list();
 
+/**
+ * Set a key inside the Array List.
+ * @param array_list The Array List to work on.
+ * @param key The key to insert/update.
+ * @param value The value to insert/update.
+ */
 void set_array_list(ArrayList *array_list, char *key, char *value);
 
+/**
+ * Get a value based on a key from an Array List.
+ * @param array_list The Array List to work on.
+ * @param key The key to search for.
+ * @return Returns the value if the key is found in the Array List otherwise it returns NULL.
+ */
 char *get_array_list(ArrayList *array_list, char *key);
 
+/**
+ * Remove a key from the Array List.
+ * @param array_list The Array List to work on.
+ * @param key The key to remove.
+ */
 void unset_array_list(ArrayList *array_list, char *key);
 
+/**
+ * Free all the memory used in the Array List.
+ * @param array_list The Array List to free.
+ */
 void free_array_list(ArrayList *array_list);
+
 #endif
diff --git a/src/include/builtins.h b/src/include/builtins.h
index ed76345..e06e2c3 100644
--- a/src/include/builtins.h
+++ b/src/include/builtins.h
@@ -18,11 +18,30 @@
 
 #ifndef _MYSHELLIN_BUILTINS
 #define _MYSHELLIN_BUILTINS
+
+/**
+ * Check if the command is a builtin or not.
+ * @param command String with the command name to check.
+ * @return Returns true if it's a builtin or false otherwise.
+ */
 bool is_builtin(char *command);
 
+/**
+ * Run the builtin command.
+ * @param args An array of strings containing the arguments to run.
+ */
 void run_builtin(StringArray *args);
 
+/**
+ * Exit the shell.
+ * @param args The arguments that were used to call exit. This is used to free the memory before exit.
+ */
 void exit_shell(StringArray *args);
 
+/**
+ * Change the directory to what the user inputs.
+ * @param args The arguments the user input.
+ */
 void change_directory(StringArray *args);
+
 #endif
diff --git a/src/include/console_line.h b/src/include/console_line.h
index e1f85eb..9f13e78 100644
--- a/src/include/console_line.h
+++ b/src/include/console_line.h
@@ -15,17 +15,42 @@
 
 #ifndef _MYSHELLIN_CONSOLE_LINE
 #define _MYSHELLIN_CONSOLE_LINE
+
 #define CONSOLE_BUFFER_SIZE 1024
 
+/**
+ * Remove new line from the end of a string.
+ * @param line The string to remove the new line from.
+ */
 void remove_new_line(char *line);
 
+/**
+ * Get the logged in user's username.
+ * @return Returns the logged in user's username.
+ */
 char *get_username();
 
+/**
+ * Get the hostname of the machine.
+ * @return Returns the hostname.
+ */
 char *get_hostname();
 
+/**
+ * Get the current working directory of the shell.
+ * @return Returns the current working directory.
+ */
 char *get_working_directory();
 
+/**
+ * Print the console line before the user input.
+ */
 void print_input_line();
 
+/**
+ * Get input from the console.
+ * @return Returns a string input by the user.
+ */
 char *get_console_input();
+
 #endif
diff --git a/src/include/launch.h b/src/include/launch.h
index d259664..d8abd33 100644
--- a/src/include/launch.h
+++ b/src/include/launch.h
@@ -17,5 +17,11 @@
 
 #ifndef _MYSHELLIN_LAUNCH
 #define _MYSHELLIN_LAUNCH
+
+/**
+ * Launch programs from the OS.
+ * @param args The arguments to launch.
+ */
 void launch_program(StringArray *args);
+
 #endif
diff --git a/src/include/loop.h b/src/include/loop.h
index 5b02bf2..45a606a 100644
--- a/src/include/loop.h
+++ b/src/include/loop.h
@@ -15,9 +15,21 @@
 
 #ifndef _MYSHELLIN_LOOP
 #define _MYSHELLIN_LOOP
+
+/**
+ * Add memory address to array to be cleaned up later.
+ * @param data The data to be cleaned up on exit.
+ */
 void add_to_cleanup(void *data);
 
+/**
+ * Cleanup memory when exiting.
+ */
 void exit_cleanup();
 
+/**
+ * This is the loop that checks for user input and acts on it.
+ */
 void loop();
+
 #endif
diff --git a/src/launch.c b/src/launch.c
index 00b8938..7670ba5 100644
--- a/src/launch.c
+++ b/src/launch.c
@@ -20,10 +20,6 @@
 #include <unistd.h>
 #include "array.h"
 
-/**
- * Launch programs from the OS.
- * @param args The arguments to launch.
- */
 void launch_program(StringArray *args) {
     pid_t child = 0;
 
diff --git a/src/loop.c b/src/loop.c
index 8860444..d3d275b 100644
--- a/src/loop.c
+++ b/src/loop.c
@@ -22,10 +22,6 @@
 #include "console_line.h"
 #include "launch.h"
 
-/**
- * Add memory address to array to be cleaned up later.
- * @param data The data to be cleaned up on exit.
- */
 void add_to_cleanup(void *data) {
     clean.array = realloc(clean.array, (clean.size + 1) * sizeof(void *));
     if (clean.array == NULL) {
@@ -35,9 +31,6 @@ void add_to_cleanup(void *data) {
     clean.array[clean.size++] = data;
 }
 
-/**
- * Cleanup memory when exiting.
- */
 void exit_cleanup() {
     for (size_t i = 0; i < clean.size; i++) {
         if (clean.array[i] != NULL) {
@@ -52,9 +45,6 @@ void exit_cleanup() {
     free_array_list(variables);
 }
 
-/**
- * This is the loop that checks for user input and acts on it.
- */
 void loop() {
     clean.size = 0;
     variables = create_array_list();