While loop with if function

Hi, need some help on whie loop and if function.

E.g,

Amount =$1-500

type = a or b

How should I write in mathlab, if I wan if the amount between 1-500 and if the type is "a" then show the 'a" result else showing "b" result. And after that will ask whether user want to continue the process or not.

Answer 1

[Walter Roberson]

if 1 <= amount & amount <= 500 & strcmp(type, 'a')

[Ken L]

Thanks Walter, what if in the end I need to ask whether user whether wan to continue input or not, may I know how to do it?

eg,

After the function and showed out the result, I will ask a question that whether user want to continur or not, if 'Y' then continue to input, and if 'N' then exit.

[Walter Roberson]

want_to_continue = input('Would you like to continue? Y|[N] ', 's');

and now you can strcmp() or strcmpi()

[Ken L]

Thanks Walter, will try it out.

[Walter Roberson]

while true
    if strcmpi(purchase_type, "D") && purchase_amount >= 0 && purchase_amount <=250
       discount = 0.95;
       net_amount = purchase_amount*discount;
       break;
    elseif strcmpi(purchase_type, "D") || strcmpi(purchase_type, "L")
       discount = 0.9;
       net_amount = purchase_amount*discount;
       break
    else
        purchase_type = input("Enter type of purchase  (L for type L/ D for Type D):","s");
    end
end

[Ken L]

Hi Walter, thanks for your quick response, I had tried your code and its working perfectly, may I have 1 more question. If I want to ask user input after every result was printed out, may I know where should I add into?

E.g,

result:

name: jamal

address: USA

net amount: 100

Do you wish to continue?: (userinput) if yes then continue the loop, if no then exit.

[Walter Roberson]

while true
    do all you stuff
    cont = input('Do you wish to continue?: (userinput) if yes then continue the loop, if no then exit. ', 's')
    if ~strcpmi(cont, 'y') && ~strcmpi(cont, 'yes')
        break;
    end
end

This considers anything other than y or yes to be no.

[Ken L]

Hi Walter, the following is my code, and it worked great for now, but I still have no idea where should I input the question once the result is printed out. Because each time it prined out then just stop.

clc;
clear;

name = input("Enter name:","s");
address = input("Enter address:","s");
purchase_amount = input("Enter amount of purchase:");
purchase_type = input("Enter type of purchase  (L for type L/ D for type D):","s");

while true
    if strcmpi(purchase_type, "D") && purchase_amount >= 0 && purchase_amount <= 250
       discount = 0.95;
       net_amount = purchase_amount*discount;
       break
    elseif strcmpi(purchase_type, "D") && purchase_amount >= 251 && purchase_amount <= 570
       discount = 0.924;
       net_amount = purchase_amount*discount;
       break
    elseif strcmpi(purchase_type, "D") || strcmpi(purchase_type, "L")&& purchase_amount >= 0 && purchase_amount <= 250
       discount = 1;
       net_amount = purchase_amount*discount;
       break
     elseif strcmpi(purchase_type, "D") || strcmpi(purchase_type, "L")&& purchase_amount >= 251 && purchase_amount <= 570
        discount = 0.95;
        net_amount = purchase_amount*discount;
       break;
    else
       fprintf ("Invalid type.\n")
       prompt = input("Do you wish to continue to purchase (Y for Yes/ N for No):","s");
        if strcmpi(prompt, "Y") == true
           name = input("Enter name:","s");
           address = input("Enter address:","s");
           purchase_amount = input("Enter amount of purchase:");
           purchase_type = input("Enter type of purchase  (L for type/ D for typed):","s");
        else
            fprintf ("Goodbye.\n")
        end

        
     end     
end
 fprintf("Name: %s\n",name);
 fprintf("Address: %s\n",address);
 fprintf("Net Amount: $%d\n",net_amount);

[Walter Roberson]

while true
    name = input("Enter name:","s");
    address = input("Enter address:","s");
    purchase_amount = input("Enter amount of purchase:");
    purchase_type = input("Enter type of purchase  (L for type L/ D for type D):","s");

    fail = false;
    if strcmpi(purchase_type, "D") && purchase_amount >= 0 && purchase_amount <= 250
       discount = 0.95;
       net_amount = purchase_amount*discount;
    elseif strcmpi(purchase_type, "D") && purchase_amount >= 251 && purchase_amount <= 570
       discount = 0.924;
       net_amount = purchase_amount*discount;
    elseif strcmpi(purchase_type, "D") || strcmpi(purchase_type, "L")&& purchase_amount >= 0 && purchase_amount <= 250
       discount = 1;
       net_amount = purchase_amount*discount;
     elseif strcmpi(purchase_type, "D") || strcmpi(purchase_type, "L")&& purchase_amount >= 251 && purchase_amount <= 570
        discount = 0.95;
        net_amount = purchase_amount*discount;
    else
       fprintf ("Invalid type.\n")
       fail = true;
    end
    
    if ~fail
        fprintf("Name: %s\n",name);
        fprintf("Address: %s\n",address);
        fprintf("Net Amount: $%d\n",net_amount);
    end
    
    prompt = input("Do you wish to continue to purchase (Y for Yes/ N for No):","s");
    if ~strcmpi(prompt, 'Y')
        break;
    end
end

fprintf("Goodbye.\n");

[Ken L]

Hi Walter, thank you very much, the code worked perfectly, really appreciate your help.