Factor numbers from 1 to 9, accumulating variable printing wrong number

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Why my accumulator variable does not print 6?

acum=1
n1=6
for i=1,2,3 do
    if n1%2==0 then acum=acum*2 n1=n1/2  
        elseif  n1%3==0 then acum=acum*3 n1=n1/3
            elseif  n1%5==0 then acum=acum*5 n1=n1/5
                elseif n1%7==0 then acum=acum*7 n1=n1/7 
    end
    if n1==1 then break end
end

print(acum)
lua

1 answer

2


I won’t touch the structure of the code much, but I will write in a way that is readable and in a more correct style. The problem is the for. The numbers placed there appear to be random. The first must be the beginning of the loop, so 1 is correct. The second indicates the end of the loop, so it should be 9 and not 2. The third is how much he should jump on each passage through the loop, so it should be 1. So:

local acum = 1
local n1 = 6
for i = 1, 9, 1 do
    if n1 % 2 == 0 then
        acum = acum * 2
        n1 = n1 / 2
    elseif n1 % 3 == 0 then
        acum = acum * 3
        n1 = n1 / 3
    elseif n1 % 5 == 0 then
        acum = acum * 5
        n1 = n1 / 5
    elseif n1 % 7 == 0 then
        acum = acum * 7
        n1 = n1 / 7 
    end
    if n1 == 1 then break end
end
print(acum)

Behold working in the ideone. And in the repl it.. Also put on the Github for future reference.

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