Notes

Solidity supports conditional statements if, else if and else.

Code

Compile and deploy the code block below:

solidity
IfElse.sol
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

contract IfElse {
   function foo(uint x) public pure returns (uint) {
       if (x < 10) {
           return 0;
       } else if (x < 20) {
           return 1;
       } else {
           return 2;
       }
   }

   function ternary(uint _x) public pure returns (uint) {
       // if (_x < 10) {
       //     return 1;
       // }
       // return 2;

       // shorthand way to write if / else statement
       // the "?" operator is called the ternary operator
       return _x < 10 ? 1 : 2;
   }
}