if statement

[Ray Parrish]

Ulf Rompe wrote:
> Am Donnerstag, den 20.08.2009, 13:44 -0700 schrieb Ray Parrish:
>   
>>>> to the default of 300 seconds
>>>>    if  [ $interval == "" ]
>>>>
>>>>        then
>>>>         
>>> Shouldn't this statement be something like :
>>>
>>> If [ $interval == "" ] ; then
>>>
>>> Aren't you missing the semi-colon here ?
>>>
>>>       
>> It works fine without the semi-colon, does it need to be there for
>> some other reason? 
>>     
>
> You can separate statements with either linefeeds or semicolons. Thus
> this:
>
>     if true
>     then
>         echo "it is true"
>     fi
>
> is the same as this:
>
>     if true; then
>         echo "it is true"
>     fi
>
> or even this:
>
>     if true; then echo "it is true"; fi
>
> Since "then" is a required statement on its own (but looks ugly and
> doesn't deserve an own line), it is common practice to combine "if" and
> "then" on a single line, in which case you need the semicolon.
>
> [x] ul
>   
Thank you for that clarification. I now understand what the semi-colon 
is used for in this case.

Later, Ray Parrish

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