Hi! I would like to better understand the data types (uint256) for example, what is the length of this type, in characters, what is the maximum value, is it a hexadecimal value?

Hi. uint256 means what you allocate 256 bits for unsigned int type
an unsigned integer containing n bits can have a value between 0 and 2^n - 1 (which is 2n different values).

sorry. it's not 2n. it's 2^n

you are free to convert this value into different numeral systems

Note: It is important to realize that a uint == uint256. Also, for whatever reason, a uint256 takes less gas to store than a uint8. So, if you are trying to optimize data types as you should, just realize this caveat.

@The_JoshSmith that would be awesome!

Roman Then if im tring x.length (where x is uint256 = to 4) whats the anwer? depending on the value or it has a specific size value like 00000000004

answer is 4. if you try to use number, which need more storage then you did allocate, then you will surely get integer overflow. (if you allocated storage for 5 and try to use 6, u will get 0)

got it!

(the link)

then when we say uint256

it means that i can store a decimal value upt to 2^256-1?

(2^256) -1

yep

in an easier case 2^8 = 255 would be the max value i can store

then if i do 255 + 1, it would be 0 as you said right?

@The_JoshSmith what's the easiest way to get instructions log from runtime?

Max is 255.

Use event logs and don't trigger reverts

Or use error messages in require checks and check the error message

Clear! Thanks!n