i want to make program that find prime number

i made this program, but i couldnt find errors..

and i typed primecheck(11) on command window and i got

>> primefunction(11)

error: 'primefunction' undefined near line 1, column 1

this error..

function primecheck(p)
  prime=1;
  
  for d=2:sqrt(p)
    if(rem(p,d)==0)
    
      prime=0;
    end
  endfor
  
if(prime==1)
disp('the number is prime')
else
disp('the number is not prime')
end
endfunction

Answer 1

[Image Analyst]

Instead of

endfunction

use

end

Instead of

endfor

use

end

[Ann Lee]

thank you it works!!

[Image Analyst]

I think Octave uses endfor and endfunction. Maybe you were trying to convert someone's Octave code.

[Ann Lee]

ah! you knew it .. actually i m using octave...^^;;..

[Image Analyst]

OK you should probably switch to MATLAB. If you can't now, then maybe when you work for an organization that can afford to pay for it. There are probably Octave forums where you can ask questions.

[Ann Lee]

oh okay i'll use matlab program instead of octave~

Answer 2

[Steven Lord]

MATLAB already has a function for this. See the isprime function.

[Ann Lee]

thank you i'll try!