DEFINE

Allows a number to be associated with a character string, such that the character string can be used in input decks in place of the  number. The keyword remove in the third argument will remove a defined variable from the stack of defined variables.

FORMAT:

define / name / value_real

define / name / value_integer

define / name / value_character

define / name / remove

EXAMPLE:

 define / nx / 3
 define / ny / 4 
 define / nz / 5 
 define / bottom / 0.1
 define / top / 4.0 
 define / left / 9.8 
 define / type / reflect

 surface/s1/reflect/box/0.0,left,bottom/1.0,right,top 
 rz/xyz/nx/nz/0.0,left,bottom/1.0,right,top/1,1,1

 define / top / 5.0 
 surface/s1/reflect/box/0.0,left,bottom/1.0,right,top 
 rz/xyz/nx/nz/0.0,left,bottom/1.0,right,top/1,1,1

 define / nx / remove
 define / ny / remove
 define / nz / remove