Excercise to print out exchange rate table

Strings and the String library. example from a Well House Consultants training course
More on Strings and the String library. [link]

Source code: ee Module: U104

--[[

The user is asked to enter the name and
cost of a product, and the program then
produces a table of exchange rates, stating
whether of not the amount is enough to
buy the product, and if it is the change
is reported.

]]

rate = 1.51238764
print "please enter the name of a product "
pname = io.read()
print ("How much does "..pname.." cost? ")
hmc = io.read()

for amount= 10,100,10 do
        exd = amount * rate
        change = exd - hmc
        if change < 0 then
                print (amount, exd, "Have some chicken instead")
        else
                print (amount, exd, " You can buy it and get ",
                        change, "change")
        end
end

--[[ Sample Output

[trainee@easterton gwh]$ lua ee
please enter the name of a product
Horse Meat
How much does Horse Meat cost?
23.44
10 15.1238764 Have some chicken instead
20 30.2477528 You can buy it and get 6.8077528 change
30 45.3716292 You can buy it and get 21.9316292 change
40 60.4955056 You can buy it and get 37.0555056 change
50 75.619382 You can buy it and get 52.179382 change
60 90.7432584 You can buy it and get 67.3032584 change
70 105.8671348 You can buy it and get 82.4271348 change
80 120.9910112 You can buy it and get 97.5510112 change
90 136.1148876 You can buy it and get 112.6748876 change
100 151.238764 You can buy it and get 127.798764 change
[trainee@easterton gwh]$

]]

Learn about this subject

This module and example are covered on the following public courses:
* Learning to program in Lua
* Lua Programming
* Lua Programming
Also available on on site courses for larger groups

Books covering this topic

Yes. We have over 700 books in our library. Books covering Lua are listed here and when you've selected a relevant book we'll link you on to Amazon to order.

Other Examples

This example comes from our "Strings and the String library." training module. You'll find a description of the topic and some other closely related examples on the "Strings and the String library." module index page.

Full description of the source code

You can learn more about this example on the training courses listed on this page, on which you'll be given a full set of training notes.

Many other training modules are available for download (for limited use) from our download centre under an Open Training Notes License.

Other resources

• Our Solutions centre provides a number of longer technical articles.
• Our Opentalk forum archive provides a question and answer centre.
• The Horse's mouth provides a daily tip or thought.
• Further resources are available via the resources centre.
• All of these resources can be searched through through our search engine
• And there's a global index here.

Purpose of this website

This is a sample program, class demonstration or answer from a training course. It's main purpose is to provide an after-course service to customers who have attended our public private or on site courses, but the examples are made generally available under conditions described below.

Web site author

This web site is written and maintained by Well House Consultants.

Conditions of use

Past attendees on our training courses are welcome to use individual examples in the course of their programming, but must check the examples they use to ensure that they are suitable for their job. Remember that some of our examples show you how not to do things - check in your notes. Well House Consultants take no responsibility for the suitability of these example programs to customer's needs.

This program is copyright Well House Consultants Ltd. You are forbidden from using it for running your own training courses without our prior written permission. See our page on courseware provision for more details.

Any of our images within this code may NOT be reused on a public URL without our prior permission. For Bona Fide personal use, we will often grant you permission provided that you provide a link back. Commercial use on a website will incur a license fee for each image used - details on request.