n): ... if n % x == 0: ... print(n, 'equals', x, '*', n//x) ... ...
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. ...
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...
...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...
1.if 例1:条件表达式(布尔表达式)为True 例2:条件表达式(布尔表达式)为False 例3:条件表达式(布尔表达式)有多个条件 例4:条件表达式(布尔表达式)计算结果为数字 例5:if 内的多行代码 例6:嵌套if 2.if else 例1:条件表达式为True 例2:条件表达式为False ...
# 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' ...
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') ...
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...
9 equals 3 * 3 （Yes, this is the correct code. Look closely: the else clause belongs to the for loop, not the if statement.是的，这是正确的代码。仔细查看：else子句属于for循环，而不是if语句。When used with a loop, the else clause has more in common with the else clause of a try...
It’s particularly useful in the context of a conditional statement. To illustrate, the example below shows a toy function that checks the length of a string object: Python >>> def validate_length(string): ... if (n := len(string)) < 8: ... print(f"Length {n} is too short...