Contact US

Log In

Come Join Us!

Are you a
Computer / IT professional?
Join Tek-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

if -then -else question

if -then -else question

if -then -else question


i am a newbie and i have the C-like code:
if( x > 10){
    x = x + 5 - y;
    y = x;
    y = 0;
    x = 0;

and i would to figure how the above code would be in prolog.
So, i was trying :
(   X > 10
->  X is X + 5 - Y,
    Y is X
    Y is 0,
    X is 0
) .

but i am not certain, is the line "X is X + 5 - Y" correct?

Thank you.

RE: if -then -else question

moreover, if we had

if ( x > 10 + y)

in prolog it would be like the code below ?

( X > 10 + Y


RE: if -then -else question

X is X + 5 - Y fails when Y is different of 5.
In SWI-Prolog you can translate if then else by


(X > Y+10 -> <code-when-true>; <code-when-false>)
Care of parenthesis.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Tek-Tips Forums free from inappropriate posts.
The Tek-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Tek-Tips forums is a member-only feature.

Click Here to join Tek-Tips and talk with other members! Already a Member? Login

Close Box

Join Tek-Tips® Today!

Join your peers on the Internet's largest technical computer professional community.
It's easy to join and it's free.

Here's Why Members Love Tek-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close