虽然所有循环结构都可以用 while 或者 do...while表示,但 Java 提供了另一种语句 —— for 循环,使一些循环结构变得更加简单。 for循环执行的次数是在执行前就确定的。语法格式如下: for(初始化; 布尔表达式; 更新){//代码语句} 关于for 循环有以下几点说明: 最先执行初始化步骤。可以声明一种类型,但可初始...
//program to calculate the factorial of a numberpackagecom.TechVidvan.loopsDemo;publicclassWhileLoopDemo{publicstaticvoidmain(Stringargs[]){longi=0,fact=1,num=5;i=num;while(num!=0){fact=fact*num;--num;}System.out.println("The factorial of "+i+" is: "+fact);}} 输出: Thefactorialof...
package com.journaldev.javadowhileloop; public class DoWhileTrueJava { public static void main(String[] args) throws InterruptedException { do { System.out.println("Start Processing inside do while loop"); // look for a file at specific directory // if found, then process it, such as inser...
HI all , is there a problem with the proposed solution for the Do..while loop in the java course ? it seems working but it wont compile on the simulator . how can i complete the course ? import java.util.Scanner; public class Program { public static void main(String[] args) { Scann...
Example int i = 0; while (i < 5) { System.out.println(i); i++; } Try it Yourself » Note: Do not forget to increase the variable used in the condition, otherwise the loop will never end!Exercise? How many times will the following loop execute?int i = 0;while (i < 4) ...
// Java Program to display numbers from 1 to 5 import java.util.Scanner; // Program to find the sum of natural numbers from 1 to 100. class Main { public static void main(String[] args) { int i = 1, n = 5; // do...while loop from 1 to 5 do { System.out.println(i); ...
} while (condition) Thus, thesomethingpart isalwaysperformed at least once before the program moves on to testing the condition provided under While. In both While and Do-While loops, it is important to note that the condition being tested must eventually return ‘False’ for the loop to clo...
Eventually the test is false, the loop exits, and the program continues with the line after the while-loop. For example, the above while-loop prints: count:0 count:1 count:2 count:3 ... count:98 count:99 all done! The count variable starts at 0, and increases by 1 on each ite...
Program output. 12345 3. Infinite While Loop Programmers makes mistake. If theconditional-expressiongiven in while loop never terminatesthen the loop will result in an infinitewhile-loop. For example, in the previous program, if theindexvalue is not incremented after each iteration, then the condi...
break、case、 catch、 continue、 default 、do、else、 for、 if、return、switch、try、 while、finally、 throw、this、 super。 3)用于修饰的关键字有: abstract、final、native、private、protected、public、static、synchronized、transient、 volatile。 4)用于方法、类、接口、包和异常的关键字有: ...