java For 循环乘数
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For Loop Multiplying Number
提问by hama
I need some help -
我需要一些帮助 -
At the end of a for loop, I need to set an original value to the next multiple of the value.
在 for 循环结束时，我需要将原始值设置为该值的下一个倍数。
This is what I have so far -
这是我到目前为止 -
int originalNumber = 1;
for (int i = 1; i <= 10000; i++) {
originalNumber *= i;
}
However, this code will not find the multiples of 1; as the multiples of 1 should be (1, 2, 3, 4, 5, 6, ... ...)
但是，这段代码不会找到 1 的倍数；因为 1 的倍数应该是 (1, 2, 3, 4, 5, 6, ... ...)
This code that I have written will be (1, 1, 2, 6, 24) etc;
我编写的这段代码将是 (1, 1, 2, 6, 24) 等；
What is a good way to get the multiples (inside of the loop)?
获得倍数（在循环内）的好方法是什么？
回答by Jon Skeet
You don't need to change originalNumberat all - just multiply iby originalNumber:
你不需要改变originalNumber在所有-只是乘i由originalNumber：
int originalNumber = 1;
for (int i = 1; i <= 10000; i++) {
int multiple = originalNumber * i;
// Use multiple however you want to
}
To get all the multiples of 2, you'd set originalNumberto 2, etc.
要获得 2 的所有倍数，您需要设置originalNumber为 2，依此类推。
回答by Roman ?omowski
You ask for version without additional variable:
您要求没有附加变量的版本：
int originalNumber = 1;
for (int multiple = originalNumber; multiple <= 10000; multiple += originalNumber) {
// Use multiple however you want to
}
回答by Sean
int n = scanner.nextInt();
for (int i = 1; i <= 10; i++){
int multiple = i * n;
System.out.println(n + " x " + i + " = " + multiple);
}
You can try this code, it prints any multiple till 10;
Your Output (stdout)
2 x 1 = 2
2 x 2 = 4
...
2 x 10 = 20
你可以试试这个代码，它打印到 10 的任意倍数；你的输出 (stdout) 2 x 1 = 2
2 x 2 = 4 ... 2 x 10 = 20
