Programming Fundamentals/Strings/Lua
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strings.lua
[edit | edit source]-- This program splits a given comma-separated name into first and last name
-- components and then displays the name.
--
-- References:
-- https://www.mathsisfun.com/temperature-conversion.html
-- https://www.lua.org/manual/5.1/manual.html
function get_name()
local name
local index
repeat
io.write("Enter name (last, first):\n")
name = io.read()
index = string.find(name, ",")
until index ~= nil
return name
end
function get_last(name)
local last
local index
index = string.find(name, ",")
if index == nil then
last = ""
else
last = string.sub(name, 0, index - 1)
end
return last
end
function get_first(name)
local first
local index
index = string.find(name, ",")
if index == nil then
first = ""
else
first = string.sub(name, index + 1, string.len(name))
first = ltrim(first)
end
return first
end
function display_name(first, last)
io.write("Hello " .. first .. " " .. last .. "!\n")
end
function ltrim(text)
while string.sub(text, 1, 1) == " " do
text = string.sub(text, 2, string.len(text))
end
return text
end
function main()
name = get_name()
last = get_last(name)
first = get_first(name)
display_name(first, last)
end
main()
Try It
[edit | edit source]Copy and paste the code above into one of the following free online development environments or use your own Lua compiler / interpreter / IDE.