How to write a function?

[EDIT: Wed Jun 15 04:15:02 UTC 2011 - Reformat - MKF]

hey . my q is . write this program with use ((function))

1- if n<10 or=50 m=n*p*0.9

2- if n>50 or n<=100 m= n*p*0.7

3- if n>100 m= n*p*0.6

help me please

[Oleg Komarov]

http://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer

[Walter Roberson]

What if n>=10 and n<50 ? You have not defined any result for that case.

Answer 1

[Walter Roberson]

Hint:

function a = b(c,d,e,f)
  a = nan;
  if c > d and c <= e
    a = c * f * 5;
  end
end