a simple counter 1 to 100

[mike ryan]

Hi all!!

I have a question regarding printing numbers.I am printing 1 to 100 and there can't be a "," before the 1 or after the 100.I have it so it works but want to know if there is a better way to do it.

 public class Counter3_2 {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		
		int count;
		
		for(count = 0; count <= 99;count++)
								
		System.out.print( count+",");
		System.out.print(100);
// can i do this without printing the 100 extra???  <----- this is the question i am needing, can this be done with the first print statement?
    }
}   

thanks
Mike

[Jesper de Jong]

Welcome to JavaRanch!

Looking at your code, it actually prints numbers from 0 to 100, not from 1 to 100, because count starts at 0 in line 11. I'd advise you to use proper indentation, or better yet, surround the statement that's supposed to be in the loop in braces, because the way it looks now is very confusing:

    for(count = 0; count <= 99;count++)

    System.out.print( count+",");   // Note that this is the body of the loop
    System.out.print(100);          // But this is outside the loop!

Write it like this:

    for(count = 0; count <= 99;count++)
        System.out.print( count+",");   // Use indentation to show that this is the body of the loop

    System.out.print(100);  // Outside the loop

    // Better yet:
    for(count = 0; count <= 99;count++) {  // Use braces to indicate what's in the loop
        System.out.print( count+",");
    }

    System.out.print(100);  // Outside the loop

One way to avoid printing the 100 afterwards is like this:

    for(count = 0; count <= 100; count++) {
        System.out.print(count);

        // Print comma only if we are not yet at 100
        if (count < 100) {
            System.out.print(",");
        }
    }

[Mahesh Kedari]

Or rather try this

    
for(int count = 1; count <= 100; count++) {  
         System.out.print(count + (count!=100?",":""));
     }
  }

[Campbell Ritchie]

Jesper Young wrote: . . . I'd advise you to use proper indentation.

. . . that means 4 spaces at a time, not tab characters. And it is probably a bad idea to use an IDE at this early stage; your code has "Eclipse" written all over it

[mike ryan]

Hi ,

Thanks for the tipps;) to clear things up about Eclipse,I am taking a correspondence course "Programming with JAVA and Eclipse" ;) that is why i am using it.The course is 15 months plus minus how fast i learn,and i just started 3 weeks ago.
I am going through the books pretty quick as i can't get enough of it !!! Hopefully i won't have to write too many silly questions here but i am glad i found this forum and it seems really active!!!

Thanks again;
Mike

[Campbell Ritchie]

It says

No question is too simple or too small!

on the Beginning Java front page. So you aren't asking silly questions. You have actually hit a common problem called the out-by-one error which will reappear many times in your career the way dandelions reappear on a lawn!

[Hunter McMillen]

Is out-by-one the same as off-by-one? They seem to be the same, but I've never heard out-by-one.

Hunter

[Campbell Ritchie]

Hunter McMillen wrote:Is out-by-one the same as off-by-one?

yes. If I used the wrong name, sorry.

[mike ryan]

hi,

Thanks again and a general question.Is it not a good idea to learn JAVA with Eclipse? Well even if it is i will have to continue it because i have paid quite a bit for the course;)
But i am also using other sources and will be purchasing a book or 2 as well.

I am glad to see allot of participation here though, and maybe i will be able to answer a question or 2 myself eventually ;)

Take care
Mike

[Hunter McMillen]

If you're taking a course it most likely won't be that big of an issue, as you have an instructor who can help you through some of the quirks of your IDE. In general though, if you were learning on your own it would be better NOT to use an IDE, because you end up wasting time learning the IDE and not the language.

Hunter

[Campbell Ritchie]

There are also things you learn to do at the command line which you miss because the IDE does them all for you.

[john chris]

@Test
public void StringBuilderTest(){
StringBuffer sb = new StringBuffer();

for(int i = 0; i<100; i++ ){
sb.append(i).append(",");
}
System.out.println(sb.toString());
System.out.println(sb.deleteCharAt(sb.length()-1));
}