Java奇数循环
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Java Odd Number Loop
提问by Javier
I am trying to output the first "x" odds, but I am clueless on how to stop the loop at the number that x is. For example... if you input 6, I want it to show 1, 3, 5, 7, 9, 11. However, my coding does it for all the odds.
我试图输出第一个“x”赔率，但我对如何在 x 的数字处停止循环一无所知。例如...如果您输入 6，我希望它显示 1, 3, 5, 7, 9, 11。但是，我的编码可以解决所有问题。
import java.util.Scanner;
public class OddNumber {
public static void main(String[] args) {
// TODO Auto-generated method stub
System.out.println("Please input a number.");
Scanner keyboard = new Scanner(System.in);
int x = keyboard.nextInt();
int total = x*x;
if (x > 0){
System.out.println("The first 5 odd numbers are...");
}
if (x > 0){
for (int i = 0; i < total; i++){
if (i % 2 != 0){
System.out.println(i+"");
}}
System.out.println("The total is "+total);
}
}
}
采纳答案by Peshal
Something like this should work:
这样的事情应该工作：
public static void main(String[] args) {
// TODO Auto-generated method stub
System.out.println("Please input a number.");
Scanner keyboard = new Scanner(System.in);
int x = keyboard.nextInt();
for(int i =1; i<=x*2; i++) {
if (i%2!=0) {
System.out.print(i+", ");
}
}
keyboard.close();
}
回答by newuser
int total = x*2;
instead of
代替
int total = x*x;
回答by mamboking
For you loop you should use:
对于循环，您应该使用：
for (int i=0; i<x; i++) {
System.out.println((i*2)+1);
}
回答by Dave
This is most efficient (based on the unusual requirements):
这是最有效的（基于不寻常的要求）：
var oddNumber = 1;
for (int i=0; i<x; i++) {
System.out.println(oddNumber);
oddNumber += 2;
}
回答by BateTech
Change your forloop to:
将您的for循环更改为：
for (int i = 1; i <= x; i++){
System.out.println(i * 2 - 1);
}
or an alternative:
或替代方案：
for (int i = 1; i < x * 2; i = i + 2){
System.out.println(i);
}
回答by Joe's Morgue
Your if (i % 2 != 0){
你的 if (i % 2 != 0){
You can address it a few ways.
您可以通过几种方式解决它。
After that, you can:
之后，您可以：
if (i != x){
System.out.print(i+", ");
}
OR, you can:
或者，您可以：
if (i % 2 && i != x){
System.out.print(i+", ");
}
that will do both checks at the same time.
这将同时进行两项检查。
回答by Dima Bors
For odd numbers:
对于奇数：
for(int i=0; i<number; i++)
{
i=i+1;
System.out.println(i);
}
For even numbers:
对于偶数：
for(int i=1; i<number; i++)
{
i=i+1;
System.out.println(i);
}
