从输入数字开始显示5个偶数序列的Java程序

Question

I need a java program that will print a sequence of 5 even numbers starting from the input number.

The output should be : 2 4 6 8 10

But when I input 4 the output was : 4 6 8 but it should be: 4 6 8 10 12 how to set a sequence of 5 even numbers starting from the input. enter image description here

So far this is my code:

    int sum = 0;
    System.out.println("Enter number:");

    int num = Integer.parseInt(br.readLine());
    if (num % 2 == 0) {
        for (int x = num; x <= 6; x++) // HERE
        {
            System.out.print(num + " ");
            sum = sum + num;
            num = num + 2;
        }
        System.out.println("");
        System.out.println("Sum is " + sum);
    }

It would help me a lot. thanks in advance!

Answer 1

You just need to loop 5 times, so consider

    int num= Integer.parseInt(br.readLine());
    if (num%2 == 0)
    {
        for (int x=0; x < 5;x++) 
        {    
          System.out.print(num + " ");
          num=num+2;
        }
    }

Based upon your comment (loop for 10 for odd) so could do

    int num= Integer.parseInt(br.readLine());
    int loopTo = 10;
    if (num%2 == 0)
    {
       loopTo = 5;
    }

     for (int x=0; x < loopTo;x++) 
     {    
          System.out.print(num + " ");
          num=num+2;
     }

Answer 2

System.out.println("Enter number: ");
int num= Integer.parseInt(br.readLine());
int loopTo = 0;
int sum = 0;
if (num%2 == 0)
{
   loopTo = 5;
 for (int x=0; x < loopTo;x++) 
 {    
      System.out.print(num + " ");
      sum=sum+num;
      num=num+2;
 }
}
else if (num%2!=0)
 {
     loopTo=10;
  for (int x=0; x < loopTo;x++) 
  {    
       System.out.print(num + " ");
       sum=sum+num;
       num=num+1;
  }
 }
 System.out.println("");
 System.out.println("Sum is "+ sum);

Gotcha! This is what I needed. Thanks for all your help.