标点符号切换全半角！
后面的 print("c大于4") 己经是一行普通代码,不再属于条件执行体,从而导致 else 语句没有if语句,引发编译错误。 运行上面代码,将看到如下错误: SyntaxError : invalid syntax 不要随意缩进 需要说明的是,虽然 Python 语法允许代码块随意缩进 N 个空格,但同一个代码块内的代码必须保持相同的缩进,不能一会缩进 2...
对于上面的 if 分支语句,执行过程是非常简单的,即如果 if 条件为“真”,程序就会执行 if 条件后面的多条语句;否则就会依次判断 elif 条件,如果 elif 条件为“真”,程序就会执行 elif 条件后面的多条语句……如果前面所有条件都为“假”,程序就会执行 else 后的代码块(如果有)。 在上面的条件语句中,if express...
1、语法错误 语法错误可能是初学者最常遇到的，如下面熟悉的画面：SyntaxError: invalid syntax 语法错误...
1、语法错误（Syntax error）这是最低端的错误，通常出自代码书写不规范、违反语法规则。例如关键字使用...
else if,elseif,else Execute statements if condition is true collapse all in page Syntax ifexpressionstatementselseifexpressionstatementselsestatementsend Description ifexpression,statements, endevaluates anexpression, and executes a group of statements when the expression is true. An expression is true ...
if-else-if梯子 nested if statement 嵌套if语句 (if Statement) The if statement is a single conditional based statement that executes only if the provided condition is true. if语句是一个基于条件的语句,仅在提供的条件为true时才执行。 If Statement Syntax: ...
else if,elseif,else Execute statements if condition is true collapse all in page Syntax ifexpressionstatementselseifexpressionstatementselsestatementsend Description ifexpression,statements, endevaluates anexpression, and executes a group of statements when the expression is true. An expression is true ...
else if,elseif,else Execute statements if condition is true collapse all in page Syntax ifexpressionstatementselseifexpressionstatementselsestatementsend Description ifexpression,statements, endevaluates anexpression, and executes a group of statements when the expression is true. An expression is true ...
' Multiline syntax:Ifcondition [Then] [ statements ] [ElseIfelseifcondition [Then] [ elseifstatements ] ] [Else[ elsestatements ] ]EndIf' Single-line syntax:IfconditionThen[ statements ] [Else[ elsestatements ] ] 指向示例代码的快速链接 ...