test
AB\Alpha\Beta
AB
an={1,4,9,16,⋯ }a_n = \{1, 4, 9, 16, \cdots\}
an={1,4,9,16,⋯}
测试
测试
测试
测试
测试
测试
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document.querySelectorAll('.github-emoji')
.forEach(el => {
if (!el.dataset.src) { return; }
const img = document.createEl ...
Hello World
打印"Hello World!"
C
1234567#include <stdio.h>int main(){ printf("Hello World!\n"); return 0;}
C++
12345678#include <iostream>using namespace std;int main(){ cout << "Hello World!" << endl; return 0;}
Java
12345public class Main { public static void main(String[] args) { System.out.println("Hello World!"); }}
Python
1print("Hello World!")
PHP
123<?phpecho "Hello World!";?>
C#
12345678910using System;namespace HelloWorld{ class HelloW ...