var a = [1, 2, [3, 1, 2]];
var b = {
    "name": "wpx",
    "age" : 10+20,
    "sex": true
};

for(var i = 0; i < len(a); i=i+1) {
    if(i==2) {
        println("a=", a[i][1]);
    }else{
        println("a=", a[i]);
    }
}
println(b["age"]);
a[0] = 333;
b["age"] = 31;
b["address"] = "address";
for(var i = 0; i < len(a); i=i+1) {
    if(i==2) {
        println("a=", a[i][1]);
    }else{
        println("a=", a[i]);
    }
}
println(b["age"]);
println(b["address"]);