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如何用 23 种编程语言说“Hello World”
【CSDN编者按】阅读这篇文章，你将学会用 23 种编程语言说“Hello World”。
原文链接：How To Say “Hello World” In 23 Programming Languages - aster.cloud
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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，我们如何在众多的编程语言中输出" Hello World " 呢？
在这篇文章中，我们将一起探讨 23 种编程语言，并且告诉你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，你会对现在流行的一些编程语言有一个新的了解。
01. Python
print('Hello, world!')02. C
#include <stdio.h>int main() { printf("Hello, World!"); return 0;}03. C++
#include <iostream>int main() { std::cout << "Hello World!"; return 0;}04. Java
class HelloWorld { public static void main(String[] args) { System.out.println("Hello, World!"); }}05. C#
namespace HelloWorld{ class Hello { static void Main(string[] args) { System.Console.WriteLine("Hello World!"); } }}06. Visual Basic
Imports System Module Module1 Sub Main() Console.WriteLine("Hello World!") Console.WriteLine("Press Enter Key to Exit.") Console.ReadLine() End SubEnd Module07. JavaScript
console.log('Hello World');08. SQL
CREATE TABLE helloworld (phrase TEXT);INSERT INTO helloworld VALUES ("Hello, World!");SELECT * FROM helloworld;09. 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 .datamessage: db "Hello, World", 10 ; note the newline at the end
10. PHP
<!DOCTYPE html><html><body> <h1>My first PHP page</h1> <?phpecho "Hello World!";?> </body></html>11. Swift
print("Hello, world!")12. Go
package main import "fmt" func main() { fmt.Println("hello world")}13. R
print("Hello World!")14. Classic Visual Basic
Imports System Module Module1 Sub Main() Console.WriteLine("Hello World!") Console.WriteLine("Press Enter Key to Exit.") Console.ReadLine() End SubEnd Module15. MATLAB
function y = hello_world %#codegeny = 'Hello World!';puts "Hello World"17. Rust
fn main() { println!("Hello World!");}18. Scala
@main def hello() = println("Hello, World!")19. Perl
#!/usr/bin/perluse 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; }看完文章，你是否也跃跃欲试了？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~