diff --git a/holberton.h b/holberton.h
index c1061e6..e4dcc14 100644
--- a/holberton.h
+++ b/holberton.h
@@ -29,6 +29,7 @@ int _abs(int n);
 void rev_string(char *s);
 char *itoa(int value, char *buffer, int base);
 char *unsigned_itoa(unsigned int value, char *buffer, int base);
+char *string_toupper(char *a);
 
 /* End string tools*/
 
@@ -38,6 +39,11 @@ int printString(va_list args);
 int printPercentage(va_list args);
 int printInteger(va_list args);
 int printBinary(va_list args);
+
+int printUnsignedDecimal(va_list args);
+int printUnsignedOctal(va_list args);
+int printUnsignedHex(va_list args);
+int printUnsignedHexUpper(va_list args);
 /* End print library */
 
 int (*get_print(const char *format))(va_list);
diff --git a/string-tools.c b/string-tools.c
index bcf9ff0..180fa98 100644
--- a/string-tools.c
+++ b/string-tools.c
@@ -104,7 +104,7 @@ char *unsigned_itoa(unsigned int value, char *buffer, int base)
 	{
 		r = n % base;
 		if (r >= 10)
-			buffer[i++] = 65 + (r - 10);
+			buffer[i++] = 97 + (r - 10);
 		else
 			buffer[i++] = 48 + r;
 		n /= base;
@@ -117,3 +117,22 @@ char *unsigned_itoa(unsigned int value, char *buffer, int base)
 	rev_string(buffer);
 	return (buffer);
 }
+
+
+/**
+ * *string_toupper - Changes all lowercase letters of a string to uppercase
+ * @a: Pointer to a char array char[]
+ * Return: string uppercase
+ */
+char *string_toupper(char *a)
+{
+	int i = 0;
+
+	while (a[i] != '\0')
+	{
+		if (a[i] >= 'a' && a[i] <= 'z')
+			a[i] -= 32;
+		i++;
+	}
+	return (a);
+}
diff --git a/struct_p.c b/struct_p.c
index 52b84f0..48732ae 100644
--- a/struct_p.c
+++ b/struct_p.c
@@ -16,6 +16,10 @@ int (*get_print(const char *format))(va_list)
 		{"d", printInteger},
 		{"i", printInteger},
 		{"b", printBinary},
+		{"u", printUnsignedDecimal},
+		{"o", printUnsignedOctal},
+		{"x", printUnsignedHex},
+		{"X", printUnsignedHexUpper},
 		{NULL, NULL}
 	};
 	int i;
diff --git a/test/main-holb.c b/test/main-holb.c
index 1015b3e..d660310 100644
--- a/test/main-holb.c
+++ b/test/main-holb.c
@@ -64,5 +64,18 @@ int main(void)
 	len = _printf("%b", 4294967295);
 	_printf("\nLen of the previos: %d\n", len);
 
+	len = _printf("%u", 4294967295);
+	_printf("\nLen of the previos: %d\n", len);
+
+	len = _printf("%o", 4294967295);
+	_printf("\nLen of the previos: %d\n", len);
+
+	len = _printf("%x", 4294967295);
+	_printf("\nLen of the previos: %d\n", len);
+
+	len = _printf("%X", 4294967295);
+	_printf("\nLen of the previos: %d\n", len);
+
+
     return (0);
 }
diff --git a/unsigned_types.c b/unsigned_types.c
new file mode 100644
index 0000000..7cd1daa
--- /dev/null
+++ b/unsigned_types.c
@@ -0,0 +1,79 @@
+#include "holberton.h"
+
+/**
+ * printUnsignedDecimal - Prints an unsigned int
+ * @args: Argument passed
+ *
+ * Return: length of data
+ */
+int printUnsignedDecimal(va_list args)
+{
+	char buff[40];
+	char *str;
+	unsigned int num = va_arg(args, unsigned int);
+	int size;
+
+	str = unsigned_itoa(num, buff, 10);
+	size = _strlen(str);
+
+	return (write(1, str, size));
+}
+
+/**
+ * printUnsignedOctal - Prints an unsigned octal
+ * @args: Argument passed
+ *
+ * Return: length of data
+ */
+int printUnsignedOctal(va_list args)
+{
+	char buff[40];
+	char *str;
+	int num = va_arg(args, int);
+	int size;
+
+	str = unsigned_itoa(num, buff, 8);
+	size = _strlen(str);
+
+	return (write(1, str, size));
+}
+
+
+
+/**
+ * printUnsignedHex - Prints an unsigned hex
+ * @args: Argument passed
+ *
+ * Return: length of data
+ */
+int printUnsignedHex(va_list args)
+{
+	char buff[40];
+	char *str;
+	int num = va_arg(args, int);
+	int size;
+
+	str = unsigned_itoa(num, buff, 16);
+	size = _strlen(str);
+
+	return (write(1, str, size));
+}
+
+/**
+ * printUnsignedHexUpper - Prints an unsigned hex upper
+ * @args: Argument passed
+ *
+ * Return: length of data
+ */
+int printUnsignedHexUpper(va_list args)
+{
+	char buff[33];
+	char *str;
+	int num = va_arg(args, int);
+	int size;
+
+	str = string_toupper(unsigned_itoa(num, buff, 16));
+	size = _strlen(str);
+
+	return (write(1, str, size));
+}