In for loop, All the students are getting same grades?

Hello, I was making code to sum, average and grade students based on marks of Maths, Chemistry and Physics. Sum and average is done but grading is not working. It is returning same grade to all students. Kindly Help, Regards.

[Adam]

How are we supposed to help if you don't provide us with any code that you are using?! You could be doing any one of a number of things incorrectly.

Answer 1

[Adam]

You made the same mistake that people in the past have made asking this very same question.

Sum is an array so in a loop you need to use

Sum(i)

in all your elseif statements. You have a for loop looping round variable i, but you don't use i so you basically do the same thing every time round the loop.

There are neater ways to do it, but I'll ignore those for now and just do the minimal correction to the code you have.

[Muhammad Maaz Bin Tahir]

Thank you so much, It worked. Also I am new to Matlab, So i didn't know that.

Answer 2

[Muhammad Maaz Bin Tahir]

clear all
clc
C=input('Marks of students in Chemistry = ');
P=input('Marks of students in Physics = ');
M=input('Marks of students in Maths = ');
Sum = C + P + M ;
for n=1:size(C);
    fprintf('Total Marks of Student = %0.2f\n', Sum);
end
AVG= (C+P+M)/3 ;
for n=1:size(C);
    fprintf('Average Marks of Student = %0.2f\n', AVG);
end

for i= 1 : length(Sum);
  if Sum>=275
 fprintf('The grade of Student is "A-1",\n')
  else if Sum>=250;
      fprintf('The grade of Student is "A",\n ')
  else if Sum>=225;
      fprintf('The grade of Student is "B",\n')
  else if Sum>=200;
      fprintf('The grade of Student is "C",\n')
  else if Sum>=175;
      fprintf('The grade of Student is "D",\n')
  else if Sum>=150;
      fprintf('The grade of Student is "E",\n')
  else 
      fprintf('The grade of Student is "F",\n')
      end
      end
      end
      end
      end
  end
end

[Adam]

Please add this as a comment of the original question or edit it into the question. It isn't an answer.