/usr/bin/python# -*- coding: UTF-8 -*-# 例3:if语句多个条件num=9ifnum>=0andnum<=10:# 判断值是否在0~10之间print'hello'# 输出结果: hellonum=10ifnum<0ornum>10:# 判断值是否在小于0或大于10print'hello'else:print'undefine'# 输出结果: undefinenum=8#
否则执行B语句，python的if...else...功能更加强大，在if和else之间添加数个elif,有更多的条件选择，...
（C 很多数据类型，SQL也一样，python比较少，至少我第一个学习的语言是python，你不是想出来说 list,...
An else statement follows an if statement, and contains code that is called when the if statement evaluates to False. As with if statements, the code inside the block should be indented. You can chain if and else statements to determine which option in a series of possibilities is true. Fo...
if condition: # body of if statement else: # body of else statementHere, if the condition inside the if statement evaluates toTrue - the body of if executes, and the body of else is skipped. False - the body of else executes, and the body of if is skipped...
1、当我们使用组合条件时,Python会进行短路计算。使用and操作时,它将返回第一个虚值或最后一项。使用or操作时,它会返回第一个真值或最后一项。 2、表达式(expressions)和语句(statements)不同。赋值语句(assignment statement)不会产生任何值。但是,赋值表达式(嗄ssignment expression)在分配变量的同时还能求值。
回到with 这个语法,Guido 对之前他提出思路进行了优化: If we're going to create syntax for anonymous blocks, I think the primary use case ought to be cleanup operations to replace try/finally blocks for locking and similar things. I'd love to have syntactical support so I can write blahblah...
1、if语句 2、match..case语句 3)循环结构 1、while语句 2、for语句 4)break 和 continue 语句 1、break 语句 2、continue 语句 一、概述 Python 是一个高层次的结合了解释性、编译性、互动性和面向对象的解释性编程语言。其实python的基础语法跟其它编程语言都非常类似,只是写法有些不一样而已。
print("and also above 20!") else: print("but not above 20.") Try it Yourself » The pass Statement ifstatements cannot be empty, but if you for some reason have anifstatement with no content, put in thepassstatement to avoid getting an error. ...
3.4.3 if语句使用 if条件判断语句必须放在{% if statement %}中间,并且还必须有结束的标签{% endif %}。和python中的类似, 可以使用>,<,<=,>=,==,!=来进行判断,也可以通过and,or,not,()来进行逻辑合并操作 {%ifname==1 %} <!--name的值是否等于1--> ...