Assembly Conditional Statements (Solidity Code Example)

Example of conditional statements in assembly.

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.26;

contract AssemblyIf {
    function yul_if(uint256 x) public pure returns (uint256 z) {
        assembly {
            // if condition = 1 { code }
            // no else
            // if 0 { z := 99 }
            // if 1 { z := 99 }
            if lt(x, 10) { z := 99 }
        }
    }

    function yul_switch(uint256 x) public pure returns (uint256 z) {
        assembly {
            switch x
            case 1 { z := 10 }
            case 2 { z := 20 }
            default { z := 0 }
        }
    }
}