for循环:
public class TestFor{
public static void main(String[] args){
for(int x = 1; x < 3; x++) {
System.out.println(x);
}
}
}
计算1+2+3...+100的值
public class TestFor{
public static void main(String[] args){
int sum = 0;
// 计算1+2+.....+100的值
for(int x = 1; x <= 100; x++) {
sum = sum + x; // sum += x
}
System.out.println(sum);
}
}
while循环：
public class TestWhile{
public static void main(String[] args){
int x = 1;
/*
while (x <= 3) {
System.out.println(x);
if (x == 1) {
continue;//死循环1
}
x++;
if (x == 2) {
break;//终止循环
}
} */
do {
System.out.println(x);
x++;
}while(x <= 3);
System.out.println("循环结束");
}
}