问题描述
我试图编写此代码以读取输入的值,然后输出2与输入之间的偶数整数之和。它正确地做到了,但是我无法让代码停止重复相同的输出。我如何才能将其输出一次,然后停止重复呢?
Scanner calculator = new Scanner(system.in);
System.out.println("Enter a number greater than 2:");
int num = calculator.nextInt();
do {
int sum = 0;
for (int i = 2; i <= num; i += 2) {
sum += i;
}
System.out.println("The sum of the even numbers through " + num + " is "+ sum);
}while (num >= 2 );
}
}
解决方法
创建和存储num中存储的值,以及来自标准输入的所有其他请求都在do while循环之外。考虑在while循环中向标准输入num = calculator.nextInt();
添加一个请求。