当条件为假时,程序流将继续执行紧接着循环的下一条语句。流程图在这里,while 循环的关键点是循环可能一次都不会执行。当条件被测试且结果为假时,会跳过循环主体,直接执行紧接着 while 循环的下一条语句。实例实例 using System; namespace Loops { class Program { static void Main(string[] args) { /* ...
string_value = input("Please enter an int. value: ") while string_value !="": int_value = int(string_value) if int_value % 2 == 0: even += 1 else: odd += 1 string_value = input("Please enter an int. value: ") if even + odd == 0: print("No values were found. Try ...
/root/scala/demo.scala:2: warning: comparing values of types Unit and String using `!=' will always yield true while((line=readLine())!="")意思Unit(赋值语句返回值)和 String 做不等比较永远为 true。什么的代码会是一个死循环。正因为 While 循环没有值,因此在纯函数化编程中应该避免使用 while...
Each for loop contains a sequencer that determines how many times the loop should run. Some loops use the range function to delimit the starting and stopping points. Other loops use a sequential data structure, such as a list, string, or dictionary, to define the sequence. In this case, ...
public static void main(String[] args) { for (int i = 0; i < 5; i++) { System.out.println("i = " + i); } } } 2. while 循环 while 循环用于在条件为真时重复执行代码块。 java public class WhileLoopExample { public static void main(String[] args) { ...
1. Awk While Loop Example: Create a string of a specific length $awk 'BEGIN { while (count++<50) string=string "x"; print string }' xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx The above example uses the ‘BEGIN { }’ special block that gets executed before anything else in an Aw...
Example 2 – Setting Remarks Using the Do While Loop Steps Create a new column to display the remarks. Go to the Developer tab. Select Visual Basic. In the Visual Basic window, go to the Insert tab. Select Module. Enter the following code. Sub Do_While_Loop_Offset() Dim i As Integer...
The word 'while' in Python is a reserved word which creates a while loop using the syntax: while condition: do_stuff. If do_stuff is more than one line, it should be put on the next line and indented. The 'condition' is evaluated before each iteration of the loop, and 'do_stuff'...
// echo empty string if no image for this board if ($imgcount < 3 && !isset($dbImageFile)) { echo ""; } …我认为如果电路板没有分配图像,它会输出一个空字符串,而不是不需要的单个标记。该单个图像标记在其路径中缺少文件名(尽管我显然希望完全停止输出该图像标记) 然后在...
This chapter provides tutorial examples and notes about loop statements. Topics include 'For Next' statements, 'While' statements, 'Do' statements, examples of loop of loop statements.