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Dimension declaration

 
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christyleomin



Joined: 08 Apr 2011
Posts: 155
PostPosted: Mon Jul 04, 2011 2:16 pm    Post subject: Dimension declaration Reply with quote
Please can anyone tell me the difference between declation using DIMENSION or just feclaring as INTEGER/REAL?
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davidb



Joined: 17 Jul 2009
Posts: 560
Location: UK
PostPosted: Tue Jul 05, 2011 7:13 am    Post subject: Reply with quote
Lets work with real variable (its the same with integers).

When you want arrays, you can use the dimension keyword. This can either be a dimension statement, or a dimension attribute. For example if you want an array of 10 values you declare it in different ways.

Code:

! Method 1. Using the dimension statement
real a
dimension a(10)

! Method 2. Using the dimension attribute (note :: is mandatory)
real, dimension(10) :: a

! Method 3. Getting by without dimension
real a(10)


There is no difference in behaviour in each case.
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