|  |  D.14.1.7 varNum Procedure from libraryarr.lib(see  arr_lib).
 
Example:Usage:
varnum(string s);
varnum(ring_variable);
 
Return:
[int] number of given ring variable, or 0 if it does not appear
Note:
This procedure has the same functionality as varNum from the dmod.lib
package, but also accepts polys as input.
 See also:
 arrLastVar;
 arrSwapVar;
 varMat;
 varNum.|  | LIB "arr.lib";
ring R = 0,(x,y,z),dp;
varNum(y);
==> 2
ring S = 0,(x(1..5),y(1..5)),dp;
varNum("y(3)");
==> 8
 | 
 
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