How do I make a command with substring?

Question

How do I substring with a command (ultilizing io.read)? example:

io.read() question I say, Say Hello World then the console "printa" "Hello World".

"Say" is the command "Hello World" is the substring.

Answer 1

Use string.match as in the example below:

s=io.read()
c,m=s:match("(%S+)%s+(.+)$")
if c=="say" then
    print(m)
end

The default used in match is: search and capture a string of characters not spaces, skip spaces, capture the rest of the line.