Help on my function script?

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michael story
michael story 2018-9-25
编辑： Fangjun Jiang 2018-9-25
My function is [s,m]=collatz(the input number) which I used x=input('Enter a natural number:'). If I want an even input to be divided by 2, and an odd input to be multiplied by 3 plus 1. This goes on as long as the number is greater than one. Ex: starting with 3 it would give 3-10-5-16-8-4-2-1. How would I set this up?
function[s,m]=collatz()
x=input('Enter a natural number:')
while mod(x,2)==0 %shows x(natural number) is even
x=x/2
if mod(x,2)==1 %shows x(natural number) is odd
x=x*3+1
end
end

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采纳的回答

Fangjun Jiang
Fangjun Jiang 2018-9-25
almost there
while x>1
if mod(x,2)==0 %shows x(natural number) is even
x=x/2
elseif mod(x,2)==1 %shows x(natural number) is odd
x=x*3+1
end
end
  1 个评论
Fangjun Jiang
Fangjun Jiang 2018-9-25
编辑：Fangjun Jiang 2018-9-25
to prevent infinite loop when the input is a decimal number, for example 3.2, modify it as below
x=input('Enter a natural number:');
while x>1
if mod(x,2)==0 %shows x(natural number) is even
x=x/2
elseif mod(x,2)==1 %shows x(natural number) is odd
x=x*3+1
else
x
break;
end
end

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