Solidity provides inbuilt mathematical functions as well. Following are heavily used methods −
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addmod(uint x, uint y, uint k) returns (uint) − computes (x + y) % k where the addition is performed with arbitrary precision and does not wrap around at 2256.
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mulmod(uint x, uint y, uint k) returns (uint) − computes (x * y) % k where the addition is performed with arbitrary precision and does not wrap around at 2256.
Following example shows the usage of mathematical functions in Solidity.
Example
pragma solidity ^0.5.0; contract Test { function callAddMod() public pure returns(uint){ return addmod(4, 5, 3); } function callMulMod() public pure returns(uint){ return mulmod(4, 5, 3); } }
Run the above program using steps provided in chapter.
Click callAddMod button first and then callMulMod button to see the result.
Output
0: uint256: 0 0: uint256: 2