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D.11.4.6 npar

Procedure from library findifs.lib (see findifs_lib).

Usage:
npar(n); n a number

Return:
int

Purpose:
searches for 'n' among the parameters and returns its number

Example:
 
LIB "findifs.lib";
ring r = (0,dh,dt,theta,A),t,dp;
npar(dh);
==> 1
number T = theta;
npar(T);
==> 3
npar(dh^2);
==> Incorrect parameter
==> 0