diff --git a/linkedlist.c b/linkedlist.c
index b63b765..5c6618a 100644
--- a/linkedlist.c
+++ b/linkedlist.c
@@ -3,78 +3,114 @@
 envstruct *insert_end(envstruct *head, char *key, char *value)
 {
 	envstruct *new_node = malloc(sizeof(envstruct));
-	
-	if (new_node == NULL) {
-		return NULL;
+
+	if (new_node == NULL)
+	{
+		return (NULL);
 	}
 
 	new_node->key = strdup(key);
 	new_node->value = strdup(value);
 	new_node->next = NULL;
 
-	if (head == NULL) {
-		return new_node;
+	if (head == NULL)
+	{
+		return (new_node);
 	}
 
 	envstruct *curr = head;
-	while (curr->next != NULL) {
+
+	while (curr->next != NULL)
+	{
 		curr = curr->next;
 	}
 	curr->next = new_node;
 
-	return head;
+	return (head);
 }
 
+/**
+ * get_value - gets value of env var
+ * @head: head variable
+ * @key: value variable
+ *
+ * Return: NULL
+*/
 char *get_value(envstruct *head, char *key)
 {
 	envstruct *curr = head;
-	
-	if (head == NULL || key == NULL) {
-		return NULL;
+
+	if (head == NULL || key == NULL)
+	{
+		return (NULL);
 	}
 
-	while (curr != NULL) {
-		if (strcmp(curr->key, key) == 0) {
-			return curr->value;
+	while (curr != NULL)
+	{
+		if (strcmp(curr->key, key) == 0)
+		{
+			return (curr->value);
 		}
 		curr = curr->next;
 	}
 
-	return NULL;
+	return (NULL);
 }
 
+/**
+ * remove_value - remove env variable
+ * @head: head variable
+ * @key: key variable
+ *
+ * Return: 0 or 1
+*/
 int remove_value(envstruct **head, char *key)
 {
-	if (head == NULL || *head == NULL) {
-		return 1;
+	if (head == NULL || *head == NULL)
+	{
+		return (1);
 	}
 
 	envstruct *curr = *head;
 	envstruct *prev = NULL;
 
-	while (curr != NULL) {
-		if (strcmp(curr->key, key) == 0) {
-			if (prev == NULL) {
+	while (curr != NULL)
+	{
+		if (strcmp(curr->key, key) == 0)
+		{
+			if (prev == NULL)
+			{
 				*head = curr->next;
-			} else {
+			}
+			else
+			{
 				prev->next = curr->next;
 			}
 			free(curr->key);
 			free(curr->value);
 			free(curr);
-			return 0;
+			return (0);
 		}
 
 		prev = curr;
 		curr = curr->next;
 	}
 
-	return 1;
+	return (1);
 }
 
-void free_list(envstruct *head) {
-	while (head != NULL) {
+/**
+ * free_list - frees the list_mem
+ * @head: head variable
+ *
+ * Return: void
+*/
+void free_list(envstruct *head)
+{
+	while (head != NULL)
+	{
 		envstruct *temp = head;
+
 		head = head->next;
 		free(temp->key);
 		free(temp->value);
diff --git a/main.c b/main.c
index fe8ceff..6d4384b 100644
--- a/main.c
+++ b/main.c
@@ -119,6 +119,7 @@ int is_builtin_cmd(char *cmd)
 /**
  * exec_builtin_cmd - execute builtin commands
  * @argv: argument vector - points to arguments entered
+ * @head: head of lists.
  *
  * Return: void
  */
diff --git a/main.h b/main.h
index 3721755..39022a0 100644
--- a/main.h
+++ b/main.h
@@ -25,6 +25,7 @@ typedef struct env_var
 	char *value;
 	struct env_var *next;
 } envstruct;
+
 extern char **environ;
 char *lineptr;
 
diff --git a/shell b/shell
deleted file mode 100755
index 9e81928..0000000
Binary files a/shell and /dev/null differ