Mastering Blockchain Programming with Solidity

Aggregation functions using Math.sol

This library provides some basic aggregate functions that can be used in a contract.

The OpenZeppelin contract present at Chapter09/openzeppelin-solidity/contracts/math/Math.sol is defined as follows:

library Math {    function max(uint256 a, uint256 b) internal pure returns (uint256) {        return a >= b ? a : b;    }    function min(uint256 a, uint256 b) internal pure returns (uint256) {        return a < b ? a : b;    }    function average(uint256 a, uint256 b) internal pure returns (uint256)     {        // (a + b) / 2 can overflow, so we distribute        return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2);    }}

Let's review the preceding code in more detail. The contract contains the following library functions:

• max(): Returns the maximum value ...