java中如何从10数到1
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How to count from 10 to 1 in java
提问by Sempliciotto
For a simple Java program where I want to make the program count from 10 to 1 by incrementing of 2 or 3 or 4 how would I change this code?
对于一个简单的 Java 程序，我想通过增加 2 或 3 或 4 来使程序从 10 计数到 1，我将如何更改此代码？
public class ExampleFor {
public static void main(String[] args) {
//
for(int i = 10; i > 0; i--){
System.out.println("i = " + i);
}
}
}
回答by cн?dk
Just use this method and give it the number to decrement with in param:
只需使用此方法并在参数中为其提供要递减的数字：
public static void count(int counter) {
for(int i = 10; i > 0; i-=counter){
System.out.println("i = " + i);
}
}
For exmaple to decrement by 2use:
例如通过2使用递减：
count(2);
And your main will be like this:
你的主要内容将是这样的：
public static void main(String[] args) {
count(2);// to decrement by 2
count(3);// to decrement by 3
count(4);// to decrement by 4
}
回答by vefthym
change the forloop to:
将for循环更改为：
for (int i=10; i>0; i-=2) {
System.out.println("i= "+i);
}
i-=2is an abbreviation for i = i-2
It means that the new value of iwill be the old value of iminus 2. i--is an abbreviation for i = i-1, which can be also written as i-=1
i-=2是 的缩写i = i-2
表示新的值i将是旧值的i负 2。i--是 的缩写i = i-1，也可以写成i-=1
