x = int(input("请输入一个数:")) r = x if x > 0 else -x print(r) 1. 2. 3.
Here, we haven't used indentation after theifstatement. In this case, Python thinks ourifstatement is empty, which results in an error. Python if...else Statement Anifstatement can have an optionalelseclause. Theelsestatement executes if the condition in theifstatement evaluates toFalse. Syntax...
In the above case Python evaluates each expression (i.e. the condition) one by one and if a true condition is found the statement(s) block under that expression will be executed. If no true condition is found the statement(s) block under else will be executed. In the following example,...
Python中的条件控制语句 (Conditional control statement)是通过一条或者多条语句的执行结果(True 或者 False),来决定执行的代码逻辑 。 关键词:它包含if、elif、else关键字, Python 中是不存在else if的写法,只存在 elif 这种写法。 冒号很重要:每句判断语句使用冒号 -:结尾,使用缩进划分语句块,相同缩进数的语句...
Python is one of the best languages to learn for someone new to programming. It’s powerful, flexible, and most importantly, extremely easy to read. Unlike Java or C, which look like Martian hieroglyphics, Python looks almost like English. Prime example of this is the if-else statement, wh...
代码块缩进错误:在Python中,代码块是通过缩进来确定的。请确保if和elif语句下方的代码块已正确缩进。常见的缩进方式是使用四个空格或一个制表符。如果缩进不正确,代码块将被错误地识别,导致if和elif语句的代码块不执行。 错误的语法:检查您的if和elif语句是否存在语法错误。请确保括号、冒号等符号使用正确,并注意Pyth...
If all the conditions of the “OR” operator are not satisfied, then the code associated with the “else” block will execute. Output: The output shows that one of the initialized values is the same. Example 3: Using OR Operator With Python elif Statement ...
Summary The auto-indention feature which aligns if...else clauses in Python overrides a correctly indented else clause in a for/while...else statement. Description When writing a for...else statement or a while...else statement which inc...
An if statement looks like this: if expression: statements 当某个条件为真时,可以使用if语句运行代码。 如果表达式的值为True,则执行某些语句。否则,它们不会被执行。 if语句是这样的: if expression: statements Python uses indentation (white space at the beginning of a line) to delimit blocks of code...
main__": print("ONE.py is being run directly") # line 1.3 else: print(f"ONE.py...