MySQL datatype INT(11) whereas UNSIGNED INT(10)?

Question

in MySQL if we create a field dataType of INT and does not specify any length/values then it automatically became int(11) and if we set the attribute

Answer 1

Just incase anyone doesn't quite understand Shakti's answer (as I didn't). Here's a visual representation of why:

 Signed minimum:
 - 2 1 4 7 4 8 3 6 4  8
 1 2 3 4 5 6 7 8 9 10 11

 Unsigned max (also the signed max):
 4 2 9 4 9 6 7 2 9 5
 1 2 3 4 5 6 7 8 9 10