View source for MC-Basic:COMMON or DIM SHARED or DIM ... AS CONST LONG or DOUBLE or STRING or STRING OF UTF8 or JOINT OF or LOCATION OF

{{Languages|MC-Basic:COMMON_or_DIM_SHARED_or_DIM_..._AS_CONST_LONG_or_DOUBLE_or_STRING_or_STRING_OF_UTF8_or_JOINT_OF_or_LOCATION_OF}}
{{MC-Basic
|SHORT FORM=


|SYNTAX=
Common Shared <nowiki>|</nowiki> Dim Shared <nowiki>|</nowiki> Dim ''<const_name>''As Const Long <nowiki>|</nowiki> Double <nowiki>|</nowiki> String <nowiki>|</nowiki> String of UTF8 <nowiki>|</nowiki>  Joint <nowiki>|</nowiki> Location = ''<const_value>''

|AVAILABILITY=
All versions.<br>
Declaration of UTF-8 strings is available since Version 4.5.10.

|DESCRIPTION=
These commands are used to define user constants in various scopes.

'''System''' constants are defined through the '''Common Shared''' command in configuration file (before program block), user tasks (before program block) and terminal. 

'''Task''' constants are defined through '''Dim Shared''' in user tasks (before program block). 

'''Local''' constants are defined through '''Dim''' command in user tasks within program, subroutine and function blocks.

Unlike point variables, point constants are not linked to specific robot types, since they are actually vectors, defined only by the number of coordinates.

|TYPE=
Long, Double, String, Joint or Location

|RANGE=


|UNITS=
Joint and Location constants: user defined position units.

|DEFAULT=


|SCOPE=
Configuration, Task or Terminal

Since Version 4.5.17 the global (common shared) declaration is also possible from the Library context.

|LIMITATIONS=
*Arrays and subroutine or function definitions (parameters and return values) are not supported.
*User constants must be given a value during declaration.
*User constants are writable only during declaration statement. Afterwards, they become read only.
*User constants cannot be passed “by-reference” to subroutines and functions. They must always be passed “by value”.

|EXAMPLE=
‘SCARA robot Declaration :

common shared scara as group axnm=a1 axnm=a2 axnm=a3 axnm=a4  model = 4     <br>

Common Shared LConst as Const Long = 100

Dim Shared SConst as Const String  = “Task1.Prg”

Program

Dim  JConst as Const Joint of XYZR    = {0.0, 0.0, 0.0}

Dim  LocConst as Const Location of XYZR     = #{0.0, 0.0, 0.0}

<nowiki><code></nowiki>

End Program



|SEE ALSO=
* [[MC-Basic:COMMON SHARED ... AS LONG or DOUBLE or STRING or STRING OF UTF8|COMMON SHARED ... AS LONG or DOUBLE or STRING or STRING OF UTF8]]
* [[MC-Basic:DIM SHARED ... AS LONG or DOUBLE or STRING or STRING OF UTF8|DIM SHARED ... AS LONG or DOUBLE or STRING or STRING OF UTF8]]
* [[MC-Basic:DIM ... AS LONG or DOUBLE or STRING or STRING OF UTF8|DIM ... AS LONG or DOUBLE or STRING or STRING OF UTF8]]
* [[MC-Basic:COMMON SHARED or DIM SHARED or DIM ... AS JOINT OF ...|COMMON SHARED or DIM SHARED or DIM ... AS JOINT OF ...]]
* [[MC-Basic:COMMON SHARED or DIM SHARED or DIM ... AS LOCATION OF ...|COMMON SHARED or DIM SHARED or DIM ... AS LOCATION OF ...]]

[[Category:MC-Basic:Declarations|COMMON or DIM SHARED or DIM ... AS CONST LONG or DOUBLE or STRING or STRING OF UTF8 or JOINT OF or LOCATION OF]]

}}