This series will provide answers to the list of Solidity interview questions that were published by RareSkills.
The largest value that a uint256 can store is 2²⁵⁶ — 1.
This calculates to 115_792_089_237_316_195_423_570_985_008_687_907_853_269_984_665_640_564_039_457_584_007_913_129_639_935
// SPDX-License-Identifier: MIT
pragma solidity 0.8.24;
contract Max {
function getMaxValue () external pure returns (uint256) {
// Returns: 115792089237316195423570985008687907853269984665640564039457584007913129639935
return type(uint256).max;
}
}
A uint256 can store a total of 2²⁵⁶ distinct values. The range of values that can be represented is 0 to 2²⁵⁶ — 1 inclusively. Since the first value is 0, the subtraction by 1 on the upper limit is necessary. This ensures that only 2²⁵⁶ possibilities exist.