[Solidity] How to write the ternary operator?

This section explains how to write the ternary operator in Solidity.

Syntax

Here is how the ternary operator is written in Solidity.

condition ? value if condition is true : value if condition is false

Sample Code

// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.7.0 <0.9.0;

contract Test {

    function showIsAdult(uint age) public pure returns(string memory) {
        string memory attribute = age >= 20 ? "an adult" : "a minor"; // ternary operator
        return string(abi.encodePacked("You are ", attribute, "."));
    }

}

The ternary operator in Solidity is the same as in other programming languages.