如何将单词连接在一起？

var word1 = "Hello";
var word2 = "World";
var result = word1 + " " + word2;
console.log(result);

word1 = "Hello"
word2 = "World"
result = word1 + " " + word2
print(result)

String word1 = "Hello";
String word2 = "World";
String result = word1 + " " + word2;
System.out.println(result);

string word1 = "Hello";
string word2 = "World";
string result = word1 + " " + word2;
Console.WriteLine(result);