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Editorial Team
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Asked: 2026-05-25T14:10:33+00:00

I remember once in school we had the task of programming a marquee text

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I remember once in school we had the task of programming a marquee text in pascal, that is a text that moves from left to right. I also remember that I did not have the slightest clue how to do this. Nowadays I’m still not a good programmer, and wanted to ask you guys how you would do it – without any sort of libraries of course.

I thought of putting any letter in an array value and then for example every second move the array values one position to the right or something. Don’t know if thats a good “algorithm”.

What do you guys think?

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1 Answer

  1. Editorial Team

    For example in python I would do : 

    >>> L='ABCDEFGH'
>>> l=len(L)
>>> i=0
>>> while(i<20):
    print L[i%l:]+L[:i%l]
    i+=1

    You just move the starting letter from left to right (respecting the number of letters that’s why I take the modulo (%)) and you move the rest of the string on the other side.

    and you would get :

    ABCDEFGH
BCDEFGHA
CDEFGHAB
DEFGHABC
EFGHABCD
FGHABCDE
GHABCDEF
HABCDEFG
ABCDEFGH
BCDEFGHA
CDEFGHAB
...

    Hope I understood your problem.

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