count = count + 1 Loop End Sub 输出 1 2 3 4 5 5. For Each 循环 For Each 循环用于遍历集合(如数组、列表等)。 语法 vb For Each element In collection ' 循环体 Next [element] 示例 vb Sub Main() Dim numbers() As Integer = {1, 2, 3, 4, 5} ' 遍历数组 For Each num In number...
Creating a Visual Basic For Loop <google>ADSDAQBOX_FLOW</google> The Visual BasicForloop is ideal for situations where a task needs to be performed a specific number of times. For example, perhaps a value needs to be added to a variable 100 times. A Visual BasicForloop consists of a ...
For 循环:用于已知迭代次数的情况。 While 循环:用于在条件为真时重复执行代码块。 Do While 循环:至少执行一次循环体。 Do Until 循环:在条件为假时继续执行循环。 For Each 循环:用于遍历集合中的元素。 Exit For、Exit While、Exit Do:用于立即退出循环。 Continue For:用于跳过当前迭代。 这些循环结构在 VB ...
Think of a WHILE loop like this: "while something is true, keep going round and doing this block of code again and again". "While" loops can be used to achieve exactly the same as the "for" loop example above, but here is an example that has nothing to do with counting. This code...
Loop必要。 終止Do迴圈的定義。 備註 當您想要無限次重複一組陳述式時 (直到滿足條件),請使用Do...Loop結構。 如果您想要重複陳述式一定次數,則For...Next 陳述式通常是更好的選擇。 您可以使用While或Until來指定condition,但不能同時使用這兩個。 如果這兩個您都不指定,則迴圈會繼續執行,直到Exit將控制權...
Exit Dois often used after some condition is evaluated, for example in anIf...Then...Elsestructure. You might want to exit a loop if you detect a condition that makes it unnecessary or impossible to continue iterating, such as an erroneous value or a termination request. One use ofExit ...
For more information, see While...End While Statement (Visual Basic). Do Loops The Do...Loop construction allows you to test a condition at either the beginning or the end of a loop structure. You can also specify whether to repeat the loop while the condition remains True or until it ...
Do...Loop 陳述式 (Visual Basic) 發行項 2015/06/08 本文內容 組件 備註 範例 請參閱 當Boolean 條件為 True 時重複陳述式區塊,或是重複陳述式區塊直到條件變成 True 為止。 複製 Do { While | Until } condition [ statements ] [ Continue Do ] [ statements ] [ Exit Do ] [ statements...
Visual Basic loop structures allow you to run one or more lines of code repetitively. You can repeat the statements in a loop structure until a condition is True, until a condition is False, a specified number of times, or once for each element in a collection. The following illustration ...
Creating Your First For and For Each Loop In the same way that a do and a while loop are similar, for and for each loops also share a fair bit of similarities. In a for loop the basic structure is below. For counter [As datatype] = start To end [Step step] ...