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This article introduces how to use the returns function to receive multiple values in Solidity, the content is very detailed, interested friends can refer to, hope to be helpful to you.

Function returns multiple values

/ / function can return multiple values function multipleReturns () returns (uint a, uint b, uint c) {return (1,2,3);}

Receive all return values at the same time

Function processMultipleReturns () {uint a; uint b; uint c; / / do batch assignment like this: (a, b, c) = multipleReturns ();}

Only partial return values are received

/ / or if we just want to return one of the variables: function getLastReturnValue () {uint c; / / you can leave the other fields blank: (, c) = multipleReturns ();}

Problems actually encountered in the project

Function multipleReturns () returns (string memory a, uint b, uint c) {return ("1", 2, 3);} function processMultipleReturns () {string memory a; uint b; uint c; / / to do batch assignment: (a, b, c) = multipleReturns ();} mapping (uint256 = > Tree) public dnaToTree / / obtain encryption asset details function getTreeByDna (uint256 _ Dna) public constant returns (string memory treeByDna_user, uint256 treeByDna_dna,string memory treeByDna_treeName, uint64 treeByDna_birthTime, uint256 treeByDna_needFooder, bytes32 treeByDna_status, bool treeByDna_isAdult) {return (dnaToTree [_ Dna] .user, dnaToTree [_ Dna] .DNA, dnaToTree [_ Dna] .treeName, dnaToTree [_ Dna] .encryption time, dnaToTree [_ Dna]. NeedFooder, dnaToTree [_ Dna]. Status, dnaToTree [_ Dna] .isAdult) } function getTreeByDna_d (uint256 _ Dna) public constant {string memory treeByDna_user; uint256 treeByDna_dna; string memory treeByDna_treeName; uint64 treeByDna_birthTime; uint256 treeByDna_needFooder; bytes32 treeByDna_status; bool treeByDna_isAdult; (treeByDna_user, treeByDna_dna, treeByDna_treeName, treeByDna_birthTime, treeByDna_needFooder, treeByDna_status, treeByDna_isAdult) = getTreeByDna (_ Dna) } on how to use the returns function in Solidity to receive multiple values is shared here, I hope the above content can be of some help to you, you can learn more knowledge. If you think the article is good, you can share it for more people to see.

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