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# Find out how long after division will be an integer?

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Lev Mihailov on 28 Jul 2020
Edited: KSSV on 29 Jul 2020
Hello! Is it possible to know when the condition will be met, what has been divided and the result is an integer?
A=[1:100];
for i=1:30
Ax(i)=A(i)/2;
if Ax(i) not a fractional number
Ax(i)=Ax(i);
else
break
end
end

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### Answers (2)

KSSV on 28 Jul 2020
if mod(x,1)==0 then x is an whole number/ integer.

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Lev Mihailov on 29 Jul 2020
I don't quite understand the given function
A(2)/2=1 % correctly and write to the array
A(3)/2= 1.5 % wrong and move on to the next correct number
A(4)/2=2 % correctly and write to the array
KSSV on 29 Jul 2020
A=[1:100];
count = 0 ;
iwant = zeros([],1) ;
for i=1:30
Ax(i)=A(i)/2;
if ~mod(Ax(i),1) % Ax(i) not a fractional number
count = count+1 ;
iwant(count)=Ax(i);
end
end
iwant
You need not to use a loop.
idx = mod(Ax,1) ;
iwant = Ax(idx==0) ;

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madhan ravi on 28 Jul 2020
Simple use mod()
doc mod

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