How to write a function to test for positive or negative numbers

Hi! I need to write a function that takes in numerical data as input argument and prints a message to the command window stating if the number is positive, negative or zero.

Answer 1

[Jan]

This sounds like a homework. Therefore the forum will not post a solution, because this is your homework. Post, what you have tried so far and ask a specific question. Do you know how to write a function? Search in the Getting Started chapters of the documentation, if not. Do you know the if command? Try the examples from the docs:

doc if

The sign command might help also, e.g. by switch sign(x). Then you get 3 cases: -1, 0 and +1 ans answer. See

doc switch

Printing a message to the command window works with:

fprintf('hello\n')

or

disp('This is the message')

Try it and come back, if you have a specific question.

Good luck!

Answer 2

[Rik]

You can find guidelines for posting homework on this forum here.

Have a look at the function sign, or solve this with if, elseif and else.

For printing text to the terminal, you can use disp or fprintf.

If you have trouble using one of these functions, you can open the documentation with doc FunctionName

Answer 3

[Yenchia Feng]

Try

doc sign

Hope this helps!

Answer 4

[suvam]

check whether an alphabet is vowel or consonant

[DGM]

This is not an answer to the question about positive an negative numbers. Why would you hide a question in an old unrelated thread unless you want nobody to answer it?

If you have a question, ask a question. Provide enough specific information about the task so that others know what your requirements are. This is relevant, because the question you've asked requests a misrepresentation of what vowels and consonants are. It really only warrants the naive answer. If you want something other than a naive, generally wrong answer, the problem isn't simple anymore, and you need to be more specific about what you're calling a "vowel".

https://english.stackexchange.com/a/10467

See also PLL's comment on that answer.

... also, nobody said we're talking about english.