The Tcl version numbers can be retrieved from the global Tcl internal variables
set tcl_version
set tcl_patchLevel
An interesting array is
array get tcl_platform
=> osVersion 9.4.0 pointerSize 4 byteOrder littleEndian machine i386 platform unix os Darwin user jose wordSize 4
tcl_version and tcl_patchLevel.set tcl_version
set tcl_patchLevel
An interesting array is
tcl_platform:array get tcl_platform
=> osVersion 9.4.0 pointerSize 4 byteOrder littleEndian machine i386 platform unix os Darwin user jose wordSize 4