Printing characters (Ascii) in a row/table format with a for loop and if statement?

Question

I've got to print out the Ascii codes in a table format (10 chars per row...)

At the moment I have them printing all in order. However I'd like to print 10 characters then println and print another 10...

I believe I should be able to do this with an if (if there are 10 chars, println...)statement, but I can't seem to figure out the logic of how..

Please help...

My code so far:

public class Ascii {

  public static void main (String[]args) {

   for (int c=32; c<123; c++) {

    System.out.print((char)c);

   // if(

  //System.out.println();

   }
 }

}

zb226 · Accepted Answer · 2015-10-09 11:41:58Z

3

Leverage the modulo operator % to add a newline every 10 characters:

public static void main(String[] args) {
    for (int c = 32; c < 123; c++) {
        System.out.print((char) c);
        if ((c - 31) % 10 == 0) {
            System.out.println();
        }
    }
}

Output:

 !"#$%&'()
*+,-./0123
456789:;<=
>?@ABCDEFG
HIJKLMNOPQ
RSTUVWXYZ[
\]^_`abcde
fghijklmno
pqrstuvwxy
z

edited Oct 9, 2015 at 11:41

answered Oct 9, 2015 at 11:38

zb226

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2 Comments

Suresh Atta Over a year ago

This seems to be the most cleanest among all :)

Gauthier JACQUES Over a year ago

My answer does exactly the same, and was posted a minute earlier :-)

Gauthier JACQUES · Accepted Answer · 2015-10-09 11:37:14Z

1

Here's a condition that should work.

if((c - 31) % 10 == 0) { System.out.println(); }

answered Oct 9, 2015 at 11:37

Gauthier JACQUES

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Comments

thegauravmahawar · Accepted Answer · 2015-10-09 11:38:37Z

1

Just use a counter to keep track of the position. Whenever the counter is divisible by 10 add a new line:

int count = 0;
for (int c = 32; c < 123; c++) {

  System.out.print((char)c);
  count++;
  if(count % 10 == 0)
    System.out.println();

}

answered Oct 9, 2015 at 11:38

thegauravmahawar

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Comments

Sinic · Accepted Answer · 2015-10-09 11:39:44Z

1

You could use the Modulo (%) Operator

if ( (c - 32) % 10 == 0)
  System.out.print("\n");

answered Oct 9, 2015 at 11:39

Sinic

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Comments

Jure · Accepted Answer · 2015-10-12 12:55:22Z

0

You are almost there. Just put your for loop in another for loop which will run 10 times(nested loops).

So your program will be like this:

public static void main(String[] args) 
    {
        for (int c=33; c<123; c+=10) {
            for(int i = 0;i < 10; i++)
            {
                System.out.print((char)(c+i) + " ");
            }
            System.out.println("");
        }
    }

edited Oct 12, 2015 at 12:55

answered Oct 9, 2015 at 11:35

Jure

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2 Comments

Anthony J Over a year ago

This is what I wanted to do...a loop with a loop. Could you help hint me a little further, I'm still struggling with this one!...thanks

Jure Over a year ago

@AnthonyJ Check my answer, I changed pseudo code with Java code.

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