Gossamer Forum: General: Perl Programming: Whats wrong with this if statement

Dec 15, 2001, 9:16 AM

Bonus

New User (1 post)

Dec 15, 2001, 9:16 AM

Post #1 of 12

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Whats wrong with this if statement

Hello,
I havn't a clue about perl really, but Im attempting to write a double if statement like the following:

Code:
if ($mycategory = "msm") { 
$genderselection = "Men Seeking Men" and $gendervalue = "msm";} 
else { 
if ($mycategory = "msw") { 
$genderselection = "Men Seeking Women" and $gendervalue = "msw";}} 
else { 
if ($mycategory = "wsm") { 
$genderselection = "Women Seeking Men" and $gendervalue = "wsm";}} 
else { 
if ($mycategory = "wsw") { 
$genderselection = "Women Seeking Women" and $gendervalue = "wsw";}}

The problem must be with the && which I assumed was used for AND.

Can anyone tell me how to properly write this statement,
If my category equals msw then gender selection equals men seeking women AND gendervalue equals msw otherwise if my category equals bla bla bla, you get the drift Im sure.

Would this be considered a nested if statement, and if so, how does one properly write it.

Thanks

Last edited by:

Bonus: Dec 15, 2001, 9:27 AM

Dec 15, 2001, 9:32 AM

Andy

Veteran / Moderator (18441 posts)

Dec 15, 2001, 9:32 AM

Post #2 of 12

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Re: [Bonus] Whats wrong with this if statement In reply to

Code:
if ($mycategory = "msm") { 
$genderselection = "Men Seeking Men"; $gendervalue = "msm";} 
elsif ($mycategory = "msw") { 
$genderselection = "Men Seeking Women"; $gendervalue = "msw"; } 
elsif ($mycategory = "wsm") { 
$genderselection = "Women Seeking Men"; $gendervalue = "wsm";} 
elsif ($mycategory = "wsw") { 
$genderselection = "Women Seeking Women"; $gendervalue = "wsw";}}

Hopefully that will do what you want Tongue

I hope you can see what you were doing wrong Wink

Andy (mod)
andy@ultranerds.co.uk

Dec 15, 2001, 9:41 AM

Wil

Veteran / Moderator (4108 posts)

Dec 15, 2001, 9:41 AM

Post #3 of 12

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Re: [Bonus] Whats wrong with this if statement In reply to

if
elsif
else

Is the standard control strucutre layout in Perl. Note that that is meant to be elsif there is no typo. This differes from the elseif in C.

Rgds

- wil

Dec 15, 2001, 9:42 AM

Andy

Veteran / Moderator (18441 posts)

Dec 15, 2001, 9:42 AM

Post #4 of 12

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Re: [Wil] Whats wrong with this if statement In reply to

Quote:

This differes from the elseif in C.

And PHP, as i found out after 2-3 hours of trying to work out why my statement wouldnt work...lol

Andy (mod)
andy@ultranerds.co.uk

Dec 15, 2001, 10:05 AM

Wil

Veteran / Moderator (4108 posts)

Dec 15, 2001, 10:05 AM

Post #5 of 12

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Re: [AndyNewby] Whats wrong with this if statement In reply to

LOL!

What is it in PHP?

- wil

Dec 15, 2001, 10:22 AM

Paul

Veteran (19537 posts)

Dec 15, 2001, 10:22 AM

Post #6 of 12

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Re: [Bonus] Whats wrong with this if statement In reply to

Hi Bonus,

There are a couple of problems. Firstly you are using:

if (something = 'value')

= is used to assign a value to something and is not intended to be used how you are using it.

You should use eq for comparing non-numeric strings and == for numeric.

The second problem is the way you are trying to assign two new values using and...try this:

Code:
if ($mycategory eq 'msm')  
{ 
    $genderselection = 'Men Seeking Men'; 
    $gendervalue = 'msm' 
}  
elsif ($mycategory eq 'msw')  
{ 
    $genderselection = 'Men Seeking Women';  
    $gendervalue = 'msw' 
}  
elsif ($mycategory eq 'wsm')  
{ 
    $genderselection = 'Women Seeking Men';  
    $gendervalue eq 'wsm' 
}  
elsif ($mycategory eq 'wsw')  
{ 
    $genderselection = 'Women Seeking Women';  
    $gendervalue = 'wsw' 
}

Dec 15, 2001, 11:11 AM

Andy

Veteran / Moderator (18441 posts)

Dec 15, 2001, 11:11 AM

Post #7 of 12

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Re: [PaulW] Whats wrong with this if statement In reply to

Paul, I missed the = (which should be eq), but you also have made a boo boo Wink

(you forgot the ;'s at the end of some lines).

Bonus, try this;

Code:
if ($mycategory eq 'msm') 
{ 
$genderselection = 'Men Seeking Men'; 
$gendervalue = 'msm'; 
} 
elsif ($mycategory eq 'msw') 
{ 
$genderselection = 'Men Seeking Women'; 
$gendervalue = 'msw'; 
} 
elsif ($mycategory eq 'wsm') 
{ 
$genderselection = 'Women Seeking Men'; 
$gendervalue eq 'wsm'; 
} 
elsif ($mycategory eq 'wsw') 
{ 
$genderselection = 'Women Seeking Women'; 
$gendervalue = 'wsw'; 
}