public class Demo2 {
public static void main(String[] args) {
int i = 0;
while (i<10){
i++;
System.out.print(i + " ");
}
}
}
do...while循环
public class Demo2 {
public static void main(String[] args) {
int i = 0;
do {
i++;
System.out.print(i + " ");
}while (i<10);
//先循环一次，在进行判断
}
}
for循环
public class Demo2 {
public static void main(String[] args) {
int sum = 0;
for(int i=1;i<=100;i++){
sum = sum + i;
}
System.out.println(sum);
}
}
增强for循环
遍历数组和集合的
for(int x:numbers){
sout...
}
public class Demo7 {
public static void main(String[] args) {
int[] numbers = {10,20,30,40,50};
for(int i=0;i<5;i++){
System.out.println(numbers[i]);
}
System.out.println("=================================");
/
public static void main(String[] args) {
for (int i = 1; i <= 9; i++) {
for (int j = 1; j <= i; j++) {
System.out.print(j+"*"+i+"="+(i*j)+'t');
}
System.out.println();
}
}
}
