import ballerina/io;

public function main() {
    io:println("Hello, World!");
}

import ballerina/io;

public function main() returns error? {
    // Compile-time guarantees that transactions are bracketed with
    // begin and commit or rollback. Transaction statement begins
    // a new transaction and executes a block.
    transaction {
        doStage1();
        doStage2();

        // Commit of a transaction must be done explicitly using commit.
        // Commit must be lexically within a transaction statement and may
        // return an error;
        check commit;

    }
    return;
}

function doStage1() {
    io:println("Stage1 completed");
}

function doStage2() {
    io:println("Stage2 completed");
}