How to implement if then else?

[interstellar]

Hey Friends,

if i want to make a program (if the input is x and L).

if the x is less than -L output must be 0

if the x is between -L and 0 output must be 1

if the x is between 0 and L output must be 2

if the x is more than L output must be 3.

What should be done(since there isnt any if then else commnad in labview)?

Thanks in advance

Regards

[Omar_II]

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@interstellar wrote:

(since there isnt any if then else commnad in labview)?

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The "else" in LabVIEW is the false case

IF x Then (do the True case) else (do the False case)

Just like you nest IF ELSE statements in text based, you also nest True/False cases in LabVIEW

[interstellar]

Thanks..  is there any other way?

[vt92]

The case selector will accept a number.  You can also have ranges for a case (e.g.    0..5 is zero to five).

Check the help on case structures.

https://www.ni.com/docs/en-US/bundle/labview-api-ref/page/structures/case-structure.html

http://digital.ni.com/public.nsf/websearch/A5D77ADCA661670386256A480062A340?OpenDocument 

[Omar_II]

[jcarmody]

Your first and fourth rules are both true in this case, but this is a convenient way to test multiple criterion.

[Wayne.C]

I know you can do this with a formula node.  Not sure how performance compares to other methods.

[interstellar]

Thanks for your reply.. 

cant the range be variable.. like for this case L?

[jcarmody]

DON'T DO THIS!!!!  There's a note in a style guide, somewhere, that says something ugly about nesting too many Case Structures.  It's tempting, though, and more analagous to If-Then-Else than my first response.

[interstellar]

I did this initially but this did not look nice and was difficult to understand..

What if i want to use case structure. like what vt92 said

The case selector will accept a number.  You can also have ranges for a case (e.g.    0..5 is zero to five).

Check the help on case structures.

https://www.ni.com/docs/en-US/bundle/labview-api-ref/page/structures/case-structure.html

http://digital.ni.com/public.nsf/websearch/A5D77ADCA661670386256A480062A340?OpenDocument 

cant in place of number a variable be used? like in my example 'L'...