answer = input.next().chartAt(0); }while(answer != 'y'); System.out.println(~~); } 1. 2. 3. 4. 5. 6. 7. 8. 9. 3.3 while 与 do while 的对比 while 首次即有入口条件,先判断,再执行。适用于循环次数明确的场景 do while 首次没有入口条件, 先执行,再判断。适用于循环次数不明确的...
The while loop loops through a block of code as long as a specified condition is true:SyntaxGet your own Java Server while (condition) { // code block to be executed } In the example below, the code in the loop will run, over and over again, as long as a variable (i) is less ...
下面的代码演示了如何使用while循环以及如何通过标签跳出双层循环。 publicclassOuterInnerLoop{publicstaticvoidmain(String[]args){intouterLimit=5;intinnerLimit=3;outerLoop:// 标签定义for(inti=0;i<outerLimit;i++){System.out.println("Outer Loop: "+i);for(intj=0;j<innerLimit;j++){System.out.printl...
编译“LoopSample2.java”文件,在命令行窗口输入“javac LoopSample2.java”并执行命令,编译通过后,在命令行窗口输入“java LoopSample2”运行Java程序,命令行窗口显示如下信息:另外,假如编写了以下while循环语句:while( 1 )其中,条件仅仅是一个数值常量1,由于在Java语言中,规定所有的非0值都表示真。因...
System.out.println("请输入密码:");intinput =scanner.nextInt();if( input ==password ) { validity=true;break; }else{ System.out.println("密码错误!"); } } 业务模块: 输出菜单 如果密码正确,则进入此模块 只要用户不选择退出,就重复输出菜单等待用户选择,不确定次数,使用while循环或do-while循环均可...
} int[] array = { 1,2,3};for(intelement : array) { System.out.print(element); } 中断循环 myLoop:for(inti = 0, j = 0; i < 10; i++) {while(++j < 10) {breakmyLoop;//end forcontinuemyLoop;//start next for} }
2.2案例publicclassWhileLoop{publicstaticvoidmain(String[]args){intsum=0;inti=1;while(i<=10){...
do{ //loop-statement}while(expression);II、执行流程 不管三七二十一,先做一次循环体;然后判定表达式的结果 如果结果时true则再执行循环体一次 ,继续判定 直到循环条件(表达式)的结果时false,则终止整个do-while循环 III、注意事项 知道循环终止条件,但是不确定循环次数;do-while的使用场景比较少,适用于循...
System.in);while(true){System.out.println("请输入一个整数");intguessNumber=sc.nextInt();//3...
Here, nextInt() takes integer input from the user. The while loop continues until the user enters a negative number. During each iteration, the number entered by the user is added to the sum variable. When the user enters a negative number, the loop terminates. Finally, the total sum is...