n): ... if n % x == 0: ... print(n, 'equals', x, '*', n//x) ... ...
if boolean_expression: statement(s) 注意布尔表达式后边的冒号是必须的。 2.1. 基本的 if 示例 # Basic Python If Example a =2 b=5 if a <b: print(a,'is less than',b) 执行及输出: 2.2. 多条件表达式 单个表达式里有多条件的话需要使用逻辑操作符将其分开。 # Example – Python If with multip...
Not Equals:a != b Less than:a < b Less than or equal to:a <= b Greater than:a > b Greater than or equal to:a >= b These conditions can be used in several ways, most commonly in "if statements" and loops. An "if statement" is written by using theifkeyword. ...
...2isa prime number3isa prime number4equals2*25isa prime number6equals2*37isa prime number8equals2*49equals3*3 (Yes, this is the correct code. Look closely: theelseclause belongs to theforloop,nottheifstatement.) (是的,这是正确的代码,仔细看,else子句是属于里面的for循环的,而不是属于i...
4.1 if Statements Perhaps the most well-known statement type is the if statement. For example: >>> x = int(input("Please enter an integer:")) Please enter an integer: 42 >>> if x < 0: x = 0 print('Negative changed to zero') ...
# This last statement is always executed, after the if statement is executed cmp() 函数则是相当于 <,==,> 但是在 Python3 中,cmp() 函数被移除了,所以我以后还是避免少用这个函数。 >>> x='a' >>> x+'b' is 'ab' False >>> x+'b' == 'ab' ...
1.有时候两个字符串打印出来看着⼀样，但是判断却是False？如果两个字符串末尾有其他符号，⽐如回车‘\n'，print的时候⽆法发现的，所以需要strip：a=a.strip()b=b.strip()if a==b:print "True"2.有时候==判断是 True ，is 判断却是 False?这是因为两个字符串来⾃不同的内存块，内存地址不⼀...
Perhaps the most well-known statement type is the if statement. For example: if 语句也许是最有名的语句类型。例如: >>> x = int(input("Please enter an integer: ")) Please enter an integer: 42 >>> if x < 0: ... x = 0
When you start working with other people’s code you will run into theif __name__ == '__main__'statement at the end of the Python code. What does it mean? if __name__ == ‘__main__’ in Python if name equals mainis a construct that uses a control flow statement to allow ...
问在Python中优化if-elif表达式EN我读过，您可以通过使用字典而不是if-elif语句来优化代码，但我不知道...