MATLAB: Use elseif inside a case switch. What is Wrong with the code? Only the first “if” case only works none of the elseif work?? Please any advice would help.

Question

    clc
    clear all
    disp ('Cody,Ward')
    disp ('EG167, 07')
    disp('Assignment #12')
    disp('   ')
    disp ('Problem: #21')
    disp('  ')
    rp=input('What is the rental period for the car (days): ');
    cartype=input('What type of car class (B, C, D) ?: ','s');
    switch cartype
        case 'B'
                if (1<rp) && (rp<6);
                cost=rp*27;
                fprintf('\nThe car rental cost is $%3.2f.\n\n',cost')
                elseif rp==7;
                    n=162
                    cost=n
                    fprintf('\nThe car rental cost is $%3.2f.\n\n',cost')
                elseif (7<rp) && (rp<27);
                    n=rp-7;
                    cost=162+(n*25);
                    fprintf('\nThe car rental cost is $%3.2f.\n\n',cost')
                elseif rp==28;
                    n=662;
                    cost=n;
                    fprintf('\nThe rental cost is $%3.2f.\n\n',cost')
                elseif (28<rp) && (rp<=60);
                    n=rp-28;
                    cost=662+(n*23);
                    fprintf('\nThe rental cost is $%3.2f.\n\n',cost')
                else rp>60;
                    fprintf('\nRental is not available for more than 60 days.\n\n')
                end
        case 'C'
                if (1<rp) && (rp<6);
                cost=rp*34;
                fprintf('\nThe car rental cost is $%3.2f.\n\n',cost')
                elseif rp==7;
                    n=204
                    cost=n
                    fprintf('\nThe car rental cost is $%3.2f.\n\n',cost')
                elseif (7<rp) && (rp<27);
                    n=rp-7;
                    cost=162+(n*31);
                    fprintf('\nThe car rental cost is $%3.2f.\n\n',cost')
                elseif rp==28;
                    n=824;
                    cost=n;
                    fprintf('\nThe rental cost is $%3.2f.\n\n',cost')
                elseif (28<rp) && (rp<=60);
                    n=rp-28;
                    cost=824+(n*28);
                    fprintf('\nThe rental cost is $%3.2f.\n\n',cost')
                else rp>60;
                    fprintf('\nRental is not available for more than 60 days.\n\n')
                end
        case 'D'
                if (1<rp) && (rp<6);
                fprintf('\nClass D cannot be rented for less than 7 days.\n\n')
                elseif rp==7;
                    n=276
                    cost=n
                    fprintf('\nThe car rental cost is $%3.2f.\n\n',cost')
                elseif (7<rp) && (rp<27);
                    n=rp-7;
                    cost=204+(n*31);
                    fprintf('\nThe car rental cost is $%3.2f.\n\n',cost')
                elseif rp==28;
                    n=1136;
                    cost=n;
                    fprintf('\nThe rental cost is $%3.2f.\n\n',cost')
                elseif (28<rp) && (rp<=60);
                    n=rp-28;
                    cost=1136+(n*28);
                    fprintf('\nThe rental cost is $%3.2f.\n\n',cost')
                else rp>60;
                    fprintf('\nRental is not available for more than 60 days.\n\n')
                end
    end

Answer 1

x = 0.1;
if  0 < x < 0.2
  disp('hello')
end

This sort of "IF" test does not work in MATLAB.

What happens is it first checks (0 < x)? --> true (=1)

Then (1 < 0.2)? --> false

Instead you have to write out both conditions like this:

x = 0.1;
if  (0 < x) && (x < 0.2)
  disp('hello')
end