OpenEuphoria

to Brent (Lesson 2)

• Posted by Alan Tu <ATU5713 at COMPUSERVE.COM> Sep 25, 1998
• 562 views

>>>>>
by the way the variable would be
myname=3Dbrent
mycountry=3Dnew zealand
<<<<<

What a great way to start.  First, we must know what ASCII is.  ASCII is =
a
fancy acronym for all the characters in the "standard" character set. =

Every character has an ascii value.  You may know that there are 8 bits i=
n
a byte, and 2^8 =3D 256.  That's why there are 256 ASCII characters, from=
 0
to 255.

a has value 97, A has value 65 I think.  Every character has an ASCII val=
ue
from 0 to 255.  The space bar is 32.

Remember how I said Euphoria has two types -- atoms and sequences?  Well,=

some languages have strings.  Strings are lines of characters.

To Euphoria, there are zero strings.  Strings are sequences of ASCII
values.

myname =3D abc
would be the Euphoria sequence {97,98.99} because those are the
corresponding ASCII values.  To Euphoria, there is no different between a=

string and a sequence.  A string is a sequence of ASCII numbers.

Here's the catch.  If you want to enter:

myname=3Dbrent
do you want to enter
myname =3D {asciiB,asciiR...}

I don't think so.  So, you have to surround these "strings" with qquotes.=


myname =3D "Brent"
mycountry =3D "New Zealand"

And now you're going to try your first program.

--first.ex--
sequence myname,mycountry
myname =3D "Brent"
mycountry =3D "New Zealand"
puts(1,myname) -- 1 is a i/o designator for standard output, which usuall=
y
-- is the screen
puts(1,mycountry)
--end

What happened?  It didn't jump to the next line!  The output is smushed
together.  You need to output a new line character.

For homework, look for 2.1 of refman.doc and see if you can find how to
output a new-line character.  You don't need to output your name and new
line using one statement.  Just see if you can, using puts, output a new
line character.

--constants.ex
--let's see what constants are
--you don't need to tell Euphoria what "type"
--a constant is.  Just set the value and it will figure it out.
constant myname =3D "brent"
constant mycountry =3D "New Zealand"
puts(1,myname)
puts(1,mycountry)
--end

The point is, you can define constants.  The type depends on what you put=

in.  I wrote a lot, that's it for now.

--Alan
 =