Thus, a compound if statement in Python looks like this:Python 1if <expr>: 2 <statement> 3 <statement> 4 ... 5 <statement> 6<following_statement> Here, all the statements at the matching indentation level (line
elif语句表示另外如果,该语句可以无限添加到if-else语句中,使其增加更多的可能性。 当所有的if、elif语句求值的结果均为False时,最后执行的是else语句。 ② 语句 语句,可用来描述Python语言的多种构成部分。可以将Python语句视作一个命令或计算。 Python中有两类语句: 简单语句(simple statement) 复合语句(compound ...
先说statement与expression，statement有两个含义：第一个是个很宽泛的概念，即程序设计者写下的“一行代...
When the conditional part of anif-statement is long enough to require that it be written across multiple lines, it’s worth noting that the combination of a two character keyword (i.e.if), plus a single space, plus an opening parenthesis creates a natural 4-space indent for the subsequent...
ifstatements have the same structure as function definitions orforloops1. The statement consists of a header line that ends with the colon character (:) followed by an indented block. Statements like this are calledcompound statementsbecause they stretch across more than one line. ...
The “if” statement is utilized with the combination of the “OR” operator to compare the compound condition. The “OR” operator returns a true Boolean value if any operand conditions become true. Similarly, if both conditions are false, then the “else” statement/block will be executed ...
When the conditional part of an if -statement is long enough to require that it be written across multiple lines, it's worth noting that the combination of a two character keyword (i.e. if ), plus a single space, plus an opening parenthesis creates a natural 4-space indent for the sub...
A compound statement is a construct that occupies multiple logical lines, such as a for loop or a conditional statement. An expression is a simple statement that produces and returns a value.You’ll find operators in many expressions. Here are a few examples:...
在135行添加的内容意味着将loop_stmt挂在compound_stmt下,表示loop_stmt是一个复合语句。同样compound_stmt挂在statement下(99行),表示是个语句。以此类推,它们最终都会挂在根节点file下,表示以文件的形式开发Python程序的。 loop_stmt的规则内容在第391行,方括号内说明是stmt_ty类型。底下挂了一个规则: ...
If you want to do something with the result of an expression, you need to say so: you might store it with an assignment statement or return it with a return statement. 1.5.2 Compound Statements A compound statement is so called because it is composed of other statements. ...