CODEWITHSUNDEEP
javafor-loop
Cameron K
Cameron K

Reputation: 428

2 For-Loops with chars is skipping a lot of the outpurs

I am attempting to have a java program output every combination of two characters. I made code like this:

package foo;

public class CombineChars {
    public static void main(String[] args) {
        for(char a = '0'; a <= 'z'; a++){
            for(char b = '0'; b <= 'z'; b++){
                System.out.println(a+b);
            }
        }
    }
}

What I expect is an output that looks like this:

00
01
02...
10
11

etc. But I get:

96 (First value)
97
98...
(Fluctuates here with going to like 220 then down to 150)
(Ends on) 244

Why does it do this and how can I fix it? Also I am open if there are better ways of achieving this.

Upvotes: 2

Views: 37

Answers (2)

Paul Boddington
Paul Boddington

Reputation: 37645

It's converting the chars to ints and adding as numbers.

If you want to do String concatenation you have to do

a + "" + b

instead.

Upvotes: 4

Elliott Frisch
Elliott Frisch

Reputation: 201439

You are performing integer math here,

System.out.println(a + b);

convert one (or both) arguments to a String. Like,

System.out.println(String.valueOf(a) + b);

Upvotes: 3

Related Questions