int count = 0; while (count < 5) { System.out.println("count的值为:" + count); count++; } for循环: for循环是一种在给定初始条件、循环条件和循环迭代表达式的情况下,重复执行代码块的循环结构。在每次循环开始前,会执行初始条件,然后判断循环条件是否为真,如果为真则执行循环内的代码...
The first part is the starting position of a variable that counts the number of loops. The second part tells the for loop how many times to loop. The third part tells the for loop how to count. In our case we're counting up by one, but that does not have to be the case. You c...
Java中的循环有两种主要形式：while{} 和 do{}while，它们的主要区别如下：while{} 循环：工作原理：先判断条件表达式是否为真，如果条件为真，则执行循环体内的代码块；如果条件为假，则跳过循环体，继续执行循环之后的代码。特点：条件满足时才执行循环体，因此可能一次都不执行。do{}while 循环：工作...
4. Difference betweenWhile-loop andFor-loop Unlike thefor-loopstatement, the condition-expression inwhileloop statement is not optional.In general, afor-loopstatement can be converted to awhile-loopstatement. However, not allfor-loopstatements can be converted to awhile-loopstatement. The following...
The while loop to find the Largest Number can be shortened by using a for loop instead: Click for Complex Loop Note that the action in theforloop can increase or decrease the index by any amount. Although you neverneedaforloop, you should use it instead of awhileloop when possible, sinc...
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 ...
A basic example of the Java while loop. Other supporting code was removed to improve readability and keep the code short. int x = 0; while (x < 5) { System.out.println(x); x = x + 1; } 0 1 2 3 4 x x Java Essentials - While loop in java Share Watch on Java Essential...
—for循环 –语法结构: declare –声明部分 begin –逻辑部分 for 循环变量 in 循环下限 … 循环上限 loop –循环体 end loop; end; –需要注意的是: 1、循环变量从 循环下限的值开始,每次递增1 直到循环上限的值为止 --所以循环下限跟循环上限一般都是用数字 ...
在for 循环中,continue 语句使程序立即跳转到更新语句。 在while 或者 do…while 循环中,程序立即跳转到布尔表达式的判断语句。 语法 continue 就是循环体中一条简单的语句: continue; 实例 Test.java 文件代码: publicclassTest{publicstaticvoidmain(String[]args){int[]numbers={10,20,30,40,50};for(intx:...
end loop; declare--声明部分inumber;begin--代码开始i :=1;whilei<20loop--循环开始dbms_output.put_line(i);--输出语句i :=i+1;endloop;--循环结束end;--结束部分 案例3:for循环语法: for 变量 in 范围 loop 执行的语句; end loop; declare--声明部分inumber;begin--代码开始foriin1..30loop--...