Constants

/*

Constants are data units with fixed values; their value never change while program running.

Format of constants sligthly different depending their data type.

This example demonstrate defining and usage of basic constants.

*/

PROCEDURE Main()

   CLS

   SET DATE GERM

   // String constants are strings enclosed by quotation marks ( "",'',[] )
   ? "String :", "This is a string" 

   // Numeric constants are strings of digits, decimal point (.)
   // and sign mark (+/-)
   ? "Numeric :", -123.56  

   // Logical constants are T or F enclosed by "." 
   ? "Logical :", .T. 

   // String constant converted to date type by CTOD() function
   ? "Date :", CTOD( "23.04.2012" ) 

RETURN // Main()

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