C++ hexadecimal problem

[lignin]

hello
I am working on arm cortex m3 and I can see 0xFFFFFFu1 in library . So what is the meaning of u ?
thanks for your help

 

[jayanth.devarayanadurga]

Unsigned. Maybe unsigned long.

 

[xaccto]

without checking..... unsigned long ?

 

[lignin]

thanks . I have one more question.
what is the value of this unsigned value ?

 

[alexan_e]

by u1 you probably meant ul which stands for unsigned long as mentioned

- - - Updated - - -

1048575 decimal