VALID_DATE FUNCTION PROBLEM : Write a function called valid_date that takes three positive integer scalar inputs year, month, day. If these three represent a valid date, return a logical true, otherwise false...

function [valid] = valid_date(y,m,d)

if ~isscalar(y) || ~isscalar(m) || ~isscalar(d)
   valid= false;
end

if m > 12
   valid=  false;
elseif d > 31
    valid= false;
end

if mod(y,4)==0
   valid= valid_date(y,2,29);
   valid= true;
end

if mod(y,400)==0 && mod(y,100)==0
   valid= valid_date(y,2,29);
   valid=false;
end

if m== 1 || 3 || 5 || 7 || 8 || 10 || 12 
    if d== 31
    valid= true;
    end
elseif m== 4 || 6 || 9 || 11
    if d== 31
    valid= false;
    end
        
elseif m== 2
    if d>=30
    valid= false;
    end
end

[Emirhan Bilgiç]

I keep seeing the error of "Output argument 'valid' (and maybe others) not assigned during call to 'valid_date'." Didn't i assign? Where am i missing? Thanks in advance ♥

Answer 1

[Anmol Dhiman]

Hi Emirhan ,

You need to initialize valid in the function. Add the following statement after creating function

function [valid] = valid_date(y,m,d)
valid = true; % or valid = false;

Regards,

Anmol Dhiman

[Emirhan Bilgiç]

Thank you so much!