Write a function ShowPrimes(n) that will find all prime numbers between 1 and n and return them as a vector. Do this using a for loop. Hint: use isprime(x) to check whether x is a prime number. As an example, >> primes=ShowPrimes(20) primes =

7 views (last 30 days)
I'm having some issues with this problem. So far, I have written:
function vec=ShowPrimes(n)
%Creates a vector of all of the prime numbers in a range of 1 to n
%Format:ShowPrimes(n)
for i=1:n
vec(i)=isprime(i);
end
end
This gives me a logical vector, but I need a vector of all the prime numbers. How should I go about fixing my function?

Accepted Answer

infinity
infinity on 23 Jun 2019
Hello,
The idea is that you use isprime to check is this prime or not.
Then, if it is the prime, you store the value of "i" (not isprime(i)) to the output.

More Answers (0)

Categories

Find more on Discrete Math in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!