显示语法错误，我不确定是不是环境的问题。

var Wallet = require('ethereumjs-wallet');
const fs = require('fs');

//生成i个钱包地址数量
for(var i = 0; i<3; i++){
const EthWallet = Wallet.default.generate(false);

const addressALL = EthWallet.getAddressString();
const addr = addressALL + "\n";
console.log("address:" + EthWallet.getAddressString());

const privateKeyALL = EthWallet.getPeivateKeyString();
const pKey = privateKeyALL + "\n";
console.log("privateKey:" + EthWallet.getPeivateKeyString());

//将所有地址批量保存
fs.appendFile('address.txt',addr,(err)=> {
    if (err) throw err;
    console.log('追加address');
});
//将所有私钥保存到私钥文件中
fs.appendFile('privateKeyALL.txt', pKey, (err) => {
    if (err) throw ett;
    console.log('追加privateKey');
});

}