MATLAB: ‘Not Enough Input Arguments” error in IF statement

Question

I seem to be have an issue with my function, where I would get this error, Heres my code;

The error occurs in [ If (N <10000 ], where it says 'Not Enough Input Arguements. I dont understand, its supposed to be only one variable.

function SmB = Big(N) 
%SArranges a number in ascending order
NUMARR= zeros(1,4);
if (N <10000 )
    Fourth = mod(N,10);
    Third = ( mod(N,100) - (mod(N,10)))/10;
    Second = ( mod(N,1000) - (mod(N,100)) )/100;
    First = ( mod(N,10000) - (mod(N,1000)) )/1000;
    
elseif (N<1000) % 3 digit number
    First = 0;
    Fourth = mod(N,10);
    Third = ( mod(N,100) - (mod(N,10)))/10;
    Second = ( mod(N,1000) - (mod(N,100)) )/100;
    
elseif( N<100) %2 digit 
    First = 0;
    Second = 0;
    Fourth = mod(N,10);
    Third = ( mod(N,100) - (mod(N,10)))/10;
   
elseif (N<10) %1 digit
  First = 0;
  Second = 0;
  Third = 0;
  Fourth = mod(N,10);
  
end
   NUMARR(1,1) = First;
   NUMARR(1,2) = Second;
   NUMARR(1,3) = Third;
   NUMARR(1,4) = Fourth;
   
  sort(NUMARR);
 
  SmB = (NUMARR(1,1)*1000) + (NUMARR(1,2)*100) + (NUMARR(1,3)*10) + (NUMARR(1,4)) ;
   
end

Answer 1

You're probably running the function without an input. You must include an input.

Big(77);  %this doesn't produce an error
Big();    %This DOES produce an error


Big;      %This DOES produce an error
Bin([]);  %This DOES produce an error