Java 输出1-100间的偶数

方法有很多种的

public class Test {

public static void main(String[] args) {
for (int i = 2; i <= 100; i=i+2) {
System.out.print(i+" ");

if (i%10 == 0) {

System.out.println();
}
}
}
}

结果
2 4 6 8 10
12 14 16 18 20
22 24 26 28 30
32 34 36 38 40
42 44 46 48 50
52 54 56 58 60
62 64 66 68 70
72 74 76 78 80
82 84 86 88 90
92 94 96 98 100

也可以这样

public class Test {

public static void main(String[] args) {
for (int i = 1; i <= 100; i++) {
if (i%2 == 0) {

System.out.print(i+" ");
}
}
}
}

结果：
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98 100

for (int i = 1; i <= 100; i++) {
if (i % 2 == 0) {
System.out.print(i + " ");
}
}

for(int i=2;i<=100;i+=2)
System.out.println(i);