This is an old version, view current version.
7.1 Statement block contexts
The data and parameters blocks do not allow statements of any kind because these blocks are solely used to declare the data variables for input and the parameter variables for sampling. All other blocks allow statements. In these blocks, both variable declarations and statements are allowed. The first statement that is not a variable declaration ends the list of block variable declarations. See the blocks chapter for more information about the block structure of Stan programs.