if statement - What is the correct way to use the bash if else && || shortcut? -

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I have come across some weird behavior (is not mutually weird, but I do not understand it). >

I have to write something if / to the statements, using the statement of the shorthand syntax: 

  [[1-1 points]] & amp; Amp; Echo "true" || Returns the output of the code given above:  
  true   
 Now the above code works really well. But it does not make the next code:  
  [[1-IQ1]] & amp; Amp; InfMsg "True" || InfMsg "false"   
  infMsg  is just a function giving output given by the above code:  
  true false   
 I just want to say it 'true'.  
 What is the way I & amp; Amp; Amp; || Does the syntax handle the exit code for tasks? 
 
 I doubt that your exit code for 'infMsg' is 0 (success). If we break the first piece of code:  
  [[1-IQ1]] & amp; Amp; Echo "true" || What's happening:  
     
  •   [[1-EMBA 1]] & amp; There is a higher priority than  and  to  =  (more info [here]  The first part of the code is "true" 
  •  the first half truth of that return Then,  the first half is true , the second half is the "true" echo   (& Amp; - & gt; if the part is true, the second part )  
  •  Now we have  || "wrong" echo  This part really returns the first half ( resonant "true" ) Have done so because successfully print echo   
     Now if we break the second piece of code:  
     < Code> [[1-1 points]] & amp; amp.com; InfMsg "true" ||  
       
    •   [[Anyone can be    ] & amp; amp; InfMsg "true"  has been evaluated The first side is true, after that,  the first half was true  , Executes the second half  infMsg "true"  statement (& amp;; - & gt; if part is true, run second part).  
    •  We now have  || If the status code interpreted as the success status (0) is not returned, then the first half is called False, if InfMsg is "incorrect"  if the previous command from  INMsg "true"  ( (- -> If the part is a liar, then run the other part).    
       Important information to go away here:  
         
      •  || The second half runs only if the first half is wrong.  
      •  & amp; Amp; If the first half is TRUE, then only run the second half.

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