Can any one pleaseeeeeee tell me how to convert hex to dec?
I understand but im not sure about an example i saw and i dont know how they are getting the end result.

0x5a = 5*16^1 + a*16^0 = 80 + 10 = 90

ok i understand but when i try to apply this example to this

0x7fffffff = 2147483647

i thought it would be.

7*16^7 + 15 *16^6 + 15*16^5 and down to zero, but i fail to come up with the correct result. Any Suggestions?

Thanks.