js for循环不清楚哪错了

Question

每点击一次减号按钮 deleteButton 把最上一节的竹子移除舞台同时把数组 bambooArr 中对应的竹子删除

var bambooArr = [];
var deleteButton = new PIXI.Sprite.fromImage("res/lianxi/ji/jsq7.png");
deleteButton.x = 330;
deleteButton.y = 330;
app.stage.addChild(deleteButton);
deleteButton.interactive = true;
deleteButton.on("click",remove);
//删除竹子图片
function remove(){
    if(i != 0){
    for(var a = i - 1; a < i ; a++ ){
    var zhuzi = new PIXI.Sprite.fromImage("res/lianxi/zhuzi/zhuzi.png");
    app.stage.addChild(zhuzi);
    zhuzi.x = 200 ;
    zhuzi.y = 300 ;
    bambooArr.splice(a,1);
    }
    i--;      
    bambooArr[i].x = 200 - ( i * 89 );
    bambooArr[i].y = 300 ;
    }
    //console.log("i:"+i+"数组："+bambooArr.length);    
}

Answer 1

报错是哪一行，remove 里的那个 i 在哪定义了？？ 最后的log放开的话，打印的是什么