User input, for loop printing

How do I make the for loops add my values to user_dia_prcnt and display it? The current code will only print out 0

clear all
clear clf
clear clc

user_dia_prcnt = 0;
user_age = input('Type your age: ');
user_gender = input('Type M or F: ','s');
%Gathers BMI
user_weight = input('Type your weight (lbs): ');
user_height = input('Type your height (in): ');
user_bmi = (user_weight*703)/user_height^2;

%add fprintf to final summary
fprintf('Your Body Mass Index is %f\n', user_bmi);

if(user_gender == 'M')
    if(user_age <= 45)
        if(user_bmi >= 35)
                user_dia_prcnt + 66.1;
        if(user_bmi <= 35)
                user_dia_prcnt + 51.8;
        if(user_bmi <= 30)
                user_dia_prcnt + 25.5;
        if(user_bmi <= 25)
                user_dia_prcnt + 16.9;
        else
                user_dia_prcnt + 6.2;
        end
        end
        end
        end
    end
end
fprintf('Percentage is: %f \n ',user_dia_prcnt);

Answer 1

[Julia]

Hi,

this code works:

clear all
clear clf
clear clc

user_dia_prcnt = 0;
user_age = input('Type your age: ');
user_gender = input('Type M or F: ','s');
%Gathers BMI
user_weight = input('Type your weight (lbs): ');
user_height = input('Type your height (in): ');
user_bmi = (user_weight*703)/user_height^2;

%add fprintf to final summary
fprintf('Your Body Mass Index is %f\n', user_bmi);

if strcmp(user_gender, 'M')
    if(user_age <= 45)
        if(user_bmi >= 35)
                user_dia_prcnt = user_dia_prcnt + 66.1;
        elseif(user_bmi <= 25)
               user_dia_prcnt = user_dia_prcnt + 51.8;
        elseif(user_bmi <= 30)
               user_dia_prcnt = user_dia_prcnt + 25.5;
        elseif(user_bmi <= 35)
              user_dia_prcnt = user_dia_prcnt + 16.9;
        else
               user_dia_prcnt = user_dia_prcnt + 6.2;
        end
    end
end
fprintf('Percentage is: %f \n ',user_dia_prcnt);

You don't specify what happens, if the user is female. And I think other cases are missing as well.