for(int i = 0;i<4;i++){ System.out.println("hello java"); } } } 1. 2. 3. 4. 5. 6. 7. root@debian:/home/jeff/java_coding/day004# java myfor hello java hello java hello java hello java 1. 2. 3. 4. 5. for循环执行过程
For Loop在许多场景下都有广泛的应用,例如: 数组遍历:可以使用For Loop遍历数组中的元素,对每个元素执行相应的操作。 集合遍历:对于集合类(如List、Set等),也可以使用For Loop遍历其中的元素。 文件处理:在读取文件内容时,可以使用For Loop逐行读取文件中的数据。 数据处理:对于需要对一组数据进行相同操作的情况,可...
Foreach循环(Foreach loop)是计算机编程语言中的一种控制流程语句,通常用来循环遍历数组或集合中的元素。foreach语法格式如下: for( 元素类型T 元素变量t : 遍历对象obj){ 引用了t 的java 语句; } 1. 2. 3. 以下实例演示了普通for循环和foreach循环使用: private static void test() { List<String> names...
Note that all expressions in thefor-loopare optional. In case, we do not provide theterminationexpression, we must terminate the loop inside the statements else it can result in aninfinite loop. 2. Java For-loop Example In the following program, we are iterating over an array ofintvalues....
Performance: Minimize the work done in the loop condition and update expressions to improve performance, especially in loops with a large number of iterations. Learn Java Essentials Build your Java skills from the ground up and master programming concepts. ...
Java For LoopWhen you know exactly how many times you want to loop through a block of code, use the for loop instead of a while loop:SyntaxGet your own Java Server for (statement 1; statement 2; statement 3) { // code block to be executed }...
// Java program to illustrate for loop.classforLoopDemo{publicstaticvoidmain(String args[]){intsum =0;// for loop begins// and runs till x <= 20for(intx =1; x <=20; x++) { sum = sum + x; } System.out.println("Sum: "+ sum); ...
The basicforloop was extended in Java 5 to make iteration over arrays and other collections more convenient. This newerforstatement is called theenhanced fororfor-each(because it is called this in other programming languages). I've also heard it called thefor-inloop. ...
Example 2: for loop // Program to calculate the sum of first n natural numbers // Positive integers 1,2,3...n are known as natural numbers #include <stdio.h> int main() { int num, count, sum = 0; printf("Enter a positive integer: "); scanf("%d", &num); // for loop term...
Test.java 文件代码: publicclassTest{publicstaticvoidmain(String[]args){for(intx=10;x<20;x=x+1){System.out.print("value of x :"+x);System.out.print("\n");}}} 以上实例编译运行结果如下: value of x:10value of x:11value of x:12value of x:13value of x:14value of x:15value...