General topic about condtions

[sanju.p]

Hi everyone,

Just for curiosity,

If I have condition like length in between 1000-1500 and height greater than 500.

Now, if and progn condition used.

It's like it check the condition if not satisfied execute the second statement what I have defined.


#main part.

I want that length condtion to be carried out in second statement.
Is it possible...?

Any other conditions can we use for this...?



Thanks in advance
Basic learner.

[thomas.schive]

Hey, not sure if I completely get what you're asking for here, but I'll try out with something like this ...?

(if
    (and
        (<= length 1500)
        (>= length 1000)
        (> height 500)
    )
    (progn
        (command ...)
        (blabla ...)
    )
    ;_else
    (blablabla)
)

If you're not too happy with using IF, you could also try out with COND!

/ts

[ВeekeeCZ]

Don't understand you very much, but look at this...

(if (> hgh 500)
  (progn
    (if (<= 1000 len 1500)

      (stuff to do... for hgh >500 and len 1000-1500)
      ) ; end of inner if

    (stuff to do... for just  hgh >500)
    ) ; end of progn
  ) ; end of main if

[sanju.p]

Thank you for your reply.
In your coding I want length condition to be applied second statement
(else).

In your coding it's not possible.

Correct me if I am wrong.

[_gile]

Hi,

If you have some difficulties to explain your request in plain English, you can draw and post a flowchart.

[sanju.p]

General procedureMy requirement

[sanju.p]

Please check above images, I have clearly mentioned what's to be required.

[ВeekeeCZ]

Would please STOP posting this photos? Please find some other way to post the text -- the best would be is you use the "Insert code"  button. Or is you have some Latin - Cyrillic issues, you can attach a file as well. 

[thomas.schive]

So ...

Is this what you want?

1) IF the length is between 1000 and 1500 AND the height is above 500, you would like SOMETHING to happen.

2) IF the length is between 1000 and 1500 (no matter what height is), you would like SOMETHING2 to happen.

Because now you're like "IF lenght is between 1000 and 1500 and the height is more/equal to 500, let's do this. If that's not true, let's do this and somehow involve the length condition..." I'm sorry but I'm not getting what you want to do here.

Couldn't this just be divided into two IF's or COND's, one for each?

Am i getting this right? Or is it like BeekeeCZ writes over here? 

/ts

[sanju.p]

Thank you for your suggestions, I am new to the portal.

All these conversations sent by mobile so there is problem.

[ВeekeeCZ · Accepted solution]

I this this must be it:

(if (and (>= l 1000)
         (<= l 1500))
  (progn
    (if (>= h 500)
      (progn
        (do stuff for h >= 500) ...))   ; L conditions is True, H cond is True
    
    (do stuff for all  l= 1000-1500)))   ;all objects with L condition is True (no matter what height is)

You simply have use 2 condition functions.

[Kent1Cooper]

Try this:

(if (<= 1000 L 1500)

  (if (> H 500)

    (progn ; then

      (setq higher stuff....)

      (command ...)

    ); progn

    (progn ; else

      (setq lower stuff....)

      (command ...)

    ); progn

  ); if

); if

[Note the first test -- you don't need to check for the Length being at or above 1000 and at or below 1500 separately.]

[_gile]

Hi,

I'll try a "general reply about conditions" illustrated with some flowcharts.

First, I will remind the used convention for conditions:

Example 1 (if thenIf else):

(if (Condition1)
  (if (Condition2)
    (do stuff for Condition1 = true and Condition2 = true)
    (do stuff for Condition1 = true and Condition2 = false)
  )
  (do stuff for Condition1 = false)
)

Example 2 (if then elseIf):

(if (Condition1)
  (do stuff for Condition1 = true)
  (if (Condition2)
    (do stuff for Condition1 = false and Condition2 = true)
    (do stuff for Condition1 = false and Condition2 = false)
  )
)

This is typically the case where (cond...) is used.

(cond
  ((Condition1) (do stuff for Condition1 = true))
  ((Condition2) (do stuff for Condition1 = false and Condition2 = true))
  (T (do stuff for Condition1 = false and Condition2 = false))
)

Exemple 3 (short-circuiting with and):

(if (and (Condition1) (Condition2))
  (do stuff for Condition1 = true and Condition2 = true)
  (do stuff for Condition1 = false or Condition2 = false)
)

Exemple 4 (short-circuiting with or):

(if (or (Condition1) (Condition2))
  (do stuff for Condition1 = true or Condition2 = true)
  (do stuff for Condition1 = false and Condition2 = false)
)

[sanju.p]

Thank you sir for detail flowchart explanation.

I got solution for my requirement.

[sanju.p]

Those who refer it, take care of closing brackets.

[ВeekeeCZ]

---

@sanju.p wrote:

Those who refer it, take care of closing brackets.

---

Since the LISP stands for Lost In Stupid Parenthesis, you are definitely right! 

Glad you've found your solution with some effort of yours, next time you would know.