分别使用while，do-while，for计算100以内（包括100）的偶数之后

1.while用法

package come.one;

public class One15 {
public static void main(String[] args) {
int sum= 0;
int i= 0;
while(i<=100) {
sum += i;
i += 2;
}
System.out.println("100以内的偶数之和为："+sum);
}
}

2.do-while用法

package come.one;

public class One16 {
public static void main(String[] args) {
int sum= 0;
int i= 0;
do {
sum +=i;
i += 2;
}while(i<=100);
System.out.println("100以内的偶数之和为："+sum);

}
}

3.for用法

package come.one;

public class One17 {
public static void main(String[] args) {
int sum = 0;
for(int i =0;i <= 100;i += 2){
sum += i;
}
System.out.println("100以内的偶数之和为："+sum);
}
}

输出结果

 

转载于:https://www.cnblogs.com/lpbk/p/11103427.html