Question

Create a random matrix of size 10x10, of integers between 1 and 1000, and use nested for loops over the elements of the matrix to find the number of prime elements , as well as the sum of the prime elements in the matrix.

• You can use MATLAB's built-in function isprime to check if an element is a prime number.
• You should have these variable:
  • cnt (counts the number of prime elements)
  • sm (sum of prime elements)
• In the command window print this sentence followed by a new line

There are ....  prime numbers and their sum is ...

Answer 1

MATLAB CODE:-

a=1;
b=1000;
cnt=0;
sm=0;
z = randi([1 1000],10,10)
for i=1:10
for j=1:10
if isprime(z(i,j))
cnt=cnt+1;
sm=sm+z(i,j);
end
end
end
cnt
sm
fprintf('there are %d prime numbers and their sum is %d',cnt,sm)

editor window screenshot: checks prime numbers and finds their sum

result window screenshot:

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