Non-functioning function

function output = calculateFactorial(N)
output = N*(N-1);
if (length(N) = N < 1 || N > 1)
    output = 'Error; N must be a single number and not an array';
elseif N < 0
    output = 'Error; N must be greater than Zero';
elseif rem(N,1) ~= 0
    output = 'Error; Intger must be whole number';
elseif N == 0
    output = 1; 
end

struggling with these functions. If i ommit line 2, theres then a mistake on line 3 where there is an incoorrect use of '='. I need help wrapping my head around my mistakes.

Answer 1

[madhan ravi]

if length(N) > 1

[Jacob Smith]

I've tried this and it is still an error. This time its not specific to what the error may be. Now it is just,' Error in calculateFactorial (line 2)

if length(N) > 1.'

I've also tried, if length(N) ~= 1, to the same result.

[madhan ravi]

output = calculateFactorial(1.1)

output = 'Error; Intger must be whole number'

output = calculateFactorial(-1 : 3)

output = 'Error; N must be a single number and not an array'

output = calculateFactorial(-1)

output = 'Error; N must be greater than Zero'

output = calculateFactorial(3)

output = 6

function output = calculateFactorial(N)
output = N .* (N-1);

if length(N) > 1
    output = 'Error; N must be a single number and not an array';
elseif N < 0
    output = 'Error; N must be greater than Zero';
elseif rem(N,1) ~= 0
    output = 'Error; Intger must be whole number';
elseif N == 0
    output = 1; 
end
end

[Jacob Smith]

Ok, I got it figuerd out now, the error is from not having an N value plugged in. *inserts face into palm* Thanks for the help! It feels good to know that i wasnt too far off.