while循环
变量初始化
while(循环条件){
循环体
}
示例:
public class whil {
public static void main(String[] args) {
int sum = 0;
int i = 1;
while (i <= 100) {
sum += i;
i++;
}
System.out.println(“sum=” + sum);
}
}
do-while循环
变量初始化
do{
循环体
}while(循环条件);
示例:
public class dowh {
public static void main(String[] args) {
int sum=0;
int i=1;
do{
sum+=i;
i++;
}while (i<=100);
System.out.println(+sum);
}
}
for循环
for(变量初始化;循环条件;修改循环变量的值){
循环体
}
示例:
import java.util.Scanner;
public class forx {
public static void main(String[] args) {
int score;
int sum=0;
double avg=0.0;
Scanner sc = new Scanner(System.in);
for(int i=1;i<6;++i){
System.out.println(“请输入5门功课中的第”+i+“门课的成绩”);
score=sc.nextInt();
sum+=score;
}avg=sum/5;
System.out.println(avg);
}
}