diff --git a/ft_isalnum.c b/ft_isalnum.c
new file mode 100644
index 0000000..7030f2c
--- /dev/null
+++ b/ft_isalnum.c
@@ -0,0 +1,6 @@
+#include "libft.h"
+
+int	ft_isalnum(int c)
+{
+	return (ft_isdigit(c) || ft_isalpha(c));
+}
diff --git a/libft.h b/libft.h
index 16f43aa..5d08a00 100644
--- a/libft.h
+++ b/libft.h
@@ -1,2 +1,3 @@
 int	ft_isalpha(const char c);
 int	ft_isdigit(int c);
+int ft_isalnum(int c);