在编程的世界里，" Hello World " 往往是开发者开始学习一种新语言时写的第一个程序。这个简单的程序会将 “Hello World“ 输出在我们的屏幕上。看似很简单的行为，实际上对于每一个新学习编程语言的人来说，它代表着新的起点。那么，如何在众多的编程语言中输出” Hello World " 呢？
我们一起探讨 23 种编程语言，如何在每一种语言中输出 "Hello World " 。无论你是有经验的还是初学者，阅读这篇文章，相信你一定能够有新的了解，你不可能都会吧哈哈哈！！
1. Python
print('Hello, world!')
2. C
#include <stdio.h> int main() { printf("Hello, World!"); return 0; }
3. C++
#include <iostream> int main() { std::cout << "Hello World!"; return 0; }
4. Java
class HelloWorld { public static void main(String[] args) { System.out.println("Hello, World!"); } }
5. C#
namespace HelloWorld { class Hello { static void Main(string[] args) { System.Console.WriteLine("Hello World!"); } } }
6. Visual Basic
Imports System Module Module1 Sub Main() Console.WriteLine("Hello World!") Console.WriteLine("Press Enter Key to Exit.") Console.ReadLine() End Sub End Module
7. JavaScript
console.log('Hello World');
8. SQL
CREATE TABLE helloworld (phrase TEXT); INSERT INTO helloworld VALUES ("Hello, World!"); SELECT * FROM helloworld;
9. Assembly Language
global _start section .text _start: mov rax, 1 ; system call for write mov rdi, 1 ; file handle 1 is stdout mov rsi, message ; address of string to output mov rdx, 13 ; number of bytes syscall ; invoke operating system to do the write mov rax, 60 ; system call for exit xor rdi, rdi ; exit code 0 syscall ; invoke operating system to exit section .data message: db "Hello, World", 10 ; note the newline at the end
10. PHP
<!DOCTYPE html> <html> <body> <h1>My first PHP page</h1> <?php echo "Hello World!"; ?> </body> </html>
11. Swift
print("Hello, world!")
12. Go
package main import "fmt" func main() { fmt.Println("hello world") }
13. R
Imports System Module Module1 Sub Main() Console.WriteLine("Hello World!") Console.WriteLine("Press Enter Key to Exit.") Console.ReadLine() End Sub End Module
14. Classic Visual Basic
Imports System Module Module1 Sub Main() Console.WriteLine("Hello World!") Console.WriteLine("Press Enter Key to Exit.") Console.ReadLine() End Sub End Module
15. MATLAB
function y = hello_world %#codegen y = 'Hello World!';
16. Ruby
puts "Hello World"
17. Rust
fn main() { println!("Hello World!"); }
18. Scala
@main def hello() = println("Hello, World!")
19. Perl
#!/usr/bin/perl use warnings; print("Hello, World!\n");
20. Scratch
say Hello World!
21. (Visual) FoxPro
Messagebox("Hello World!",64) ? "Hello World"
22. SAS
proc ds2 libs=work; data _null_; /* init() - system method */ method init(); declare varchar(16) message; /* method (local) scope */ message = 'Hello World!'; put message; end; enddata; run; quit;
23. Objective-C
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; NSLog (@"Hello, World!"); [pool drain]; return YES; }
心动不如行动，赶紧试着自己选择几种编程语言，打开编程世界的大门吧~
原文链接：程序员成长家园
