Re: if else if

[Sagar Tikke]

if (){

}
else if(){

}

else if(){

}

else
{

}

On 11/29/12, Ahmed Abdeen Hamed <ahmed....@gmail.com> wrote:
> Hello,
>
> What is the syntax for if else if?
>
> I am trying to do the following: The first two functions are called in the
> third. The third has a else but I am unable to make it else if. Can anyone
> take kindly a look at this and let me know?
>
> Sincerely,
>
> -Ahmed
>
> (deffunction minutes_diff
> (?arrival_minutes ?departure_minutes)
> (- ?departure_minutes ?arrival_minutes))
>
> (deffunction hours_diff
> (?arrival_hour ?departure_hour)
>
> (* (- ?departure_hour ?arrival_hour ) 60))
>
> (deffunction minutes_to_next_flight
> (?arrival_hour ?arrival_minutes ?departure_hour ?departure_minutes)
>
> (if (> (hours_diff ?arrival_hour ?departure_hour) 0)
> then
> (-
> (hours_diff ?arrival_hour ?departure_hour)
> (minutes_diff ?arrival_minutes ?departure_minutes)
> )
>
> else ;(if (<= (hours_diff ?arrival_hour ?departure_hour) 0) IS
> NEEDED!!!
> (-
> (minutes_diff ?arrival_minutes ?departure_minutes)
> (hours_diff ?arrival_hour ?departure_hour)
>
> )))
>
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[Ahmed Abdeen Hamed]

Thank you for the response. The syntax you provided is C-like not CLIPS though. I needed CLIPS syntax.

-Ahmed

[alexgian]

From the manual:

12.6.2 If...then...else Function

The if function provides an if...then...else structure to allow for conditional execution of a set of actions.

Syntax

(if <expression>
   then
      <action>*
   [else
      <action>*])

 

Any number of allowable actions may be used inside of the then or else portion, including another if...then...else structure. The else portion is optional. If <expression> evaluates to anything other than the symbol FALSE, then the actions associated with the then portion are executed. Otherwise, the actions associated with the else portion are executed. The return value of the if function is the value of the last <expression> or <action> evaluated.

=====

So it seems to me you didn't put the "then" clause in your second if statement