python 基础(二)

Hello World程序

print("Hello World!")

然后执行输出：

Hello World!

在交互式下执行

Python 2.7.14 (v2.7.14:84471935ed, Sep 16 2017, 20:25:58) [MSC v.1500 64 bit (AMD64)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> print("Hello World!")
Hello World!

对比其他语言的Hello World

C++
# include <iostream>
int main(void)
{
std::cout<<"Hello World!";
}

C语言
# include <stdio.h> 
int main(void)
{
printf("\nHello World!");
return 0;
}

Java语言
public class HelloWorld{
    //  程序的入口
    public static void main(String args[]){
        // 向控制台输出信息
        System.out.printIn("Hello World!");
    }
}

PHP
<?pjp
    echo "Hello World!";
?>

Ruby
puts "Hello World!"

Golang
package main

import "fmt"
func main(){
fmt.Printf("Hello World!\n God Bless You!")
}
```

变量\字符编码