#include <iostream>
using namespace std;
int main()
{
    cout<<"hello world";
}

C++ :

#include<iostream>
using namespace std;
int main(){
    
    cout<<"hello world"<<endl;
    return 0;
}

Python :

# coding=utf-8
print("hello world")

#include <iostream>
using namespace std;
int main()
{
    cout<<"hello world";
}