Create a code with a letter and a number two for-loops

Question

I wanna generate 743 different "codes" which should follow the following syntax: A1,A2,...,A20,B1,B2... So I thought about doing it with two for-loops.

One that goes through every "row" which is A,B,C,...
and the second one that goes through every "column" which is 1-20.

Afterwards I wanna connect them and that's going to lead to one code which is "A1" for example.

My problem is the first loop, how do I do it that hes going to add an A at the first iteration, a B at the second iteration etc...

use a `char` equal to `'A'` and increment that `char` step by step. — luk2302, Mar 22 '17 at 11:23
Ye true, 20 was just an example, i can take a higher number and thats going to be fine then — M.Dietz, Mar 22 '17 at 11:37

score 0 · Answer 1 · edited Mar 22 '17 at 11:28

0

It's simple: you just have to use a char datatype. Below is the complete code.

for(char ch='A';ch<='Z';ch++)
{
    for(int i=1;i<=20;i++)
    {
        System.out.println(ch+""+i); // this will concatenate ch and i
    }
}

edited Mar 22 '17 at 11:28

khelwood

55,782
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answered Mar 22 '17 at 11:27

bit-shashank

887
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Thanks, i didnt know that you could do "ch++" with a character. Thought its only possible with numbers. – M.Dietz Mar 22 '17 at 11:29
When i started with java it was also unknown to me now i and you both know it. – bit-shashank Mar 22 '17 at 11:30
1

To some extent `char`s *are* numbers. "A" is just a representation you get for e.g. 0x41 (in ASCII). – Fildor Mar 22 '17 at 11:31

Create a code with a letter and a number two for-loops

1 Answers1