/usr/bin/env python #-*- coding: utf-8 -*- # 控制流语句: # if语句通俗说法:“如果条件为真,执行子句中的代码” #if语句包含以下部分: # if关键字; #条件(即求值为True或则False的表达式); #冒号; #在下一行开始,缩进的代码块(称为if子句)。 name = "qzzhou" #定义name为某个值 if name ...
当前编译器已经能够把很多C语言的源程序编译成可以在java虚拟机上运行的字节码,但一直存在一个问题是,编译出的字节码存有冗余语句,例如赋值语句: a = 1; 它编译成java字节码后情况如下: aload 0 sipush 1 astore 0 假设变量a在虚拟机局部变量队列中的存储位置为0,那么
function visitSite(user) { if (user.isLoggedIn) { console.log(`你是 ${user.name}`); } console.log('欢迎来到 Coding Beauty。'); } 变成这个: function visitSite(user) { user.isLoggedIn && console.log(`你是 ${user.name}`); console.log('欢迎来到 Coding Beauty。'); } 我消除了嵌套...
# -*-coding:utf-8-*- java = 86 python = 68 if java > 80 and python > 80: print('优秀') else : print('不优秀') if ( java >= 80 and java < 90 ) or ( python >= 80 and python < 90): print('良好') 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 输出结果: 不...
前言Python 学习之旅,先来看看 Python 的代码规范,让自己先有个意识,而且在往后的学习中慢慢养成习惯目录 一、简明概述1、编码如无特殊情况, 文件一律使用 UTF-8 编码2.如无特殊情况, 文件头部必须加入#--coding:utf-8--标识2、代码格式2.1、缩进统一使用 4 个空格进行缩进2.2、行宽每行代码尽量不超过 80 个...
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If-Else Statement in Java - Learn how to use if-else statements in Java to control the flow of your program. Understand syntax, examples, and best practices.
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How do I update a single table of a DataSet using a TableAdapter, without hard-coding the table name? This seems like a really basic thing that I'm doing, yet I'm tearing my hair out trying to make it work. My situation is this: I have a project which contains a large number of...
https://www.baeldung.com/java-replace-if-statements 1. Overview Decision constructs are a vital part of any programming language. But we land up in coding a huge number of nested if statements which make our code more complex and difficult to maintain. ...