Prime number or its nearest prime numbers
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anyone please tell me in matlab how to write a function to find prime number of any number if it is not prime number then function show its nearest prime numbers... let take example ...take number 9 we know it is not prime then the program will show its nearest prime like 7 and 11..
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Accepted Answer
Andrei Bobrov
on 13 Apr 2012
input x
x = 24;
solution
X = [x x];
out = zeros(1,2);
while 1
t = isprime(X);
if all(t)
out = X;
break
elseif any(t)
out(t) = X(t);
t1 = ~t;
X(t1) = X(t1) - sum([1 -1].*t1);
else
X = X - [1 -1];
end
end
out = unique(X)
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