JavaScript return ❮PreviousJavaScriptStatementsNext❯ Examples Return the value of PI: functionmyFunction() { returnMath.PI; } Try it Yourself » Return "Hello John": document.getElementById("demo").innerHTML= myFunction("John");
JavaScript声明| Statementsreturn return return语句终止函数的执行,并返回一个指定的值给函数调用者。 语法 代码语言:javascript 复制 return [[expression]]; expression被返回的表达式。如果忽略,则返回 undefined。 描述 当在函数体中使用return语句时,函数将会停止执行。如果指定一个值,则这个值返回给函数调用者。
@文心快码return statements are only valid inside functions 文心快码 作为Comate,由文心一言驱动,我很乐意帮助你解答关于"return"语句的问题。以下是对你问题的详细回答: 解释return语句的作用: return语句在编程中用于从函数返回一个值给调用者。当执行到return语句时,函数会结束执行,并将return后面的值(如果有的...
// Only runs if elem existsvarmakeOrange=function(elem){if(!elem)return;elem.classList.add('orange');}; You can usereturnto avoidif...elsestatements# Because thereturnoperator immediately ends a function, you can use it to skip theelsein anif...elsestatement. ...
When areturnstatement is called in a function, the execution of this function is stopped. If specified, a given value is returned to the function caller. If the expression is omitted,undefinedis returned instead. The following return statements all break the function execution: ...
www.postgresql.org/docs/current/plpgsql-control-structures.html#PLPGSQL-STATEMENTS-RETURNING 本文只关注PLPGSQL中的return...setof的使用方法。...TEXT); INSERT INTO foo VALUES (1, 2, 'three'); INSERT INTO foo VALUES (4, 5, 'six'); 支持实例1-3场景,函数定义中的返回值不能是占位符类型....
https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Statements/for…in http://jsfiddle.net/danShumway/e4AUK/1/ 有几件事要记住: for..in 不保证您的数据将按任何特定顺序返回。 您的变量仍将引用索引,而不是存储在该索引处的实际值。 另请参阅下面关于将其与数组一起使用的评论。 编辑:for...
In functions that branch one might forget to return a value in one of the branches, and the consistent-return rule will warn you when that happens. This rule can be controversial though because it disallows using return statements as control flow. I think this is the biggest benefit of the...
JavaScript return[ expression ]; When thereturnstatement is executed,expressionis evaluated and returned as the value of the function. If there is no expression,undefinedis returned. Execution of the function stops when thereturnstatement is executed, even if there are other statements still remaining...
: statements return [expression] ``` 其中,`functionName`是函数的名称,`arg1, arg2, ...`是函 数的参数列表,`statements`是函数体,`expression`是可选的返回 值。当省略`return`语句时,函数返回`None`对象。 下面是一个简单的例子,演示了`return`语句的使用: ```python def sum(numbers): result = ...