elif temperature > 20: if is_sunny: print("It's a nice day!") else: print("It's a bit warm but cloudy.") else: print("It's cool outside.") 三元运算符 Python 还支持三元运算符(条件表达式),用于简化简单的 if-else 语句。 语法: python value_if_true if condition else value_if_fal...
Theelifkeyword is Python's way of saying "if the previous conditions were not true, then try this condition". Example a =33 b =33 ifb > a: print("b is greater than a") elifa == b: print("a and b are equal") Try it Yourself » ...
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。。if 是不是太快了？不搞事，哪里有东西学习。。。（C 很多数据类型，SQL也一样，python比较少，...
importthreadingimporttimedefdo_work():print("Thread starting.")time.sleep(1)# 模拟耗时操作print("Thread finishing.")if__name__=="__main__":threads=[]foriinrange(3):t=threading.Thread(target=do_work)threads.append(t)t.start()fortinthreads:t.join()# 等待所有线程完成print("All threads ...
if … elif … elif … 与其他语言的switch或case语句的作用相近。if condition_1:statement_block_1 elif condition_2:statement_block_2 else:statement_block_3 eg:例如 var1 = 100 if var1:print ("1 - if 表达式条件为 true")print (var1)var2 = 0 if var2:print ("2 - if 表达式条件为 ...
aList])# [0, 1, 4, 9, 16, 25, 36, 49, 64, 81]# [0, 1, 4, 9, 16, 25, 36, 49, 64, 81]print(list(filter(is_odd, aList)))print([x for x in aList if x%2 == 1])# [1, 3, 5, 7, 9]# [1, 3, 5, 7, 9]python-list-comprehension hosted with ...
In computer programming, we use the if statement to run a block of code only when a specific condition is met. In this tutorial, we will learn about Python if...else statements with the help of examples.
一、在cmdA中嵌套IF命令来实现“条件与”,IF命令格式如下: AI检测代码解析 IF [opt] conditionA ( IF [opt] conditionB ( IF [opt] conditionC ( ... ) ) ) 1. 2. 3. 4. 5. 6. 7. 示例 需求:只有三年级二班的同学才可以看电影,其它的同学都不可以 ...
if condition:returnTrue else:returnFalse 这真是愚蠢！该函数返回一个布尔值，那么为什么还要首先使用if块呢？正确的做法是：deff():return condition 在一项Hackerrank挑战中，参赛者需要编写一个函数来确定给定的年份是否为闰年。在公历中，须考虑三个标准来确定闰年：· 该年份可被4整除，为闰年，除非：· ...