| Re: logical_true vs nothing in an if statment [message #85929 is a reply to message #85928] |
Wed, 18 September 2013 13:07   |
munka
Messages: 36
Registered: December 2009
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Member |
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On Wednesday, September 18, 2013 12:53:44 PM UTC-7, Paul van Delst wrote:
> See:
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> http://www.exelisvis.com/docs/Definition_of_True_and_F.html
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> Your "if i then..." example is well documented (if a little strange)
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> behaviour.
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> On 09/18/13 15:44, mynameismunka@gmail.com wrote:
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>> Why is the behavior of the 'if' statement in idl like this? I
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>> was under the impression putting nothing there is equivalent to
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>> the logical_true() statment???!
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>>
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>>
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>>
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>> IDL> for i=0,10 do if i then print,'true' else print,'false'
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>> false
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>> true
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>> false
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>> true
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>> false
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>> true
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>> false
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>> true
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>> false
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>> true
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>> false
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>> IDL> for i=0,10 do if logical_true(i) then print,'true' else print,'false'
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>> false
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>> true
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>> true
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>> true
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>> true
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>> true
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>> true
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>> true
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>> true
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>> true
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>> true
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>>
Thanks for the help.
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