MATLAB: How to make a function that tell us about grades

Question

Hi every one; I going to make a function called letter_grade that takes a positive integer called score as its input argument and returns a letter grade according to the following scale: A: 91 and above; B: 81-90; C: 71-80; D: 61-70; F: below 61. Remember that to assign a letter to a variable, you need to put it in single quotes, as in: grade = 'A'. when i run the below codes i got grade 'B' for score 95.which in not correct.Kindly guide me how can i correct this code. Thanks in advance…….

function grade=letter_grade(n)
if n >= 91 && n>=100
   grade='A';
elseif n >= 81 && n>=90
  grade='B';
    elseif n >= 71 && n>=80
   grade='C';
    elseif n >= 61 && n>=70
  grade='D';
    elseif n <61 
   grade='F';
end
end

Answer 1

Try it this way:

function grade=letter_grade(n)
if n >= 91
  grade='A';
elseif n >= 81
  grade='B';
elseif n >= 71
  grade='C';
elseif n >= 61
  grade='D';
else
  grade='F';
end
end