# Singular

#### D.16.2.32 nBoundaryLatticePoints

`Syntax:`
`Polymake::nBoundaryLatticePoints(` polytope p `)`
`Assume:`
p bounded.
`Type:`
int
`Purpose:`
the number of lattice points on the relative boundary of p.
`Example:`
 ``` LIB"polymake.lib"; ==> Welcome to polymake ==> Copyright (c) 1997-2012 ==> Ewgenij Gawrilow, Michael Joswig (TU Darmstadt) ==> http://www.polymake.org intmat M[3][3]=1,2,-1, 1,-1,2, 1,-1,-1; polytope p = polytopeViaPoints(M); Polymake::nBoundaryLatticePoints(p); ==> polymake: used package cddlib ==> Implementation of the double description method of Motzkin et al. ==> Copyright by Komei Fukuda. ==> http://www.ifor.math.ethz.ch/~fukuda/cdd_home/cdd.html ==> ==> polymake: WARNING: rule latte.integer_points: N_LATTICE_POINTS : CONE_AM\ BIENT_DIM , FACETS | INEQUALITIES failed: can't parse output from LattE's\ 'count' ==> polymake: WARNING: rule latte.integer_points: N_INTERIOR_LATTICE_POINTS \ : CONE_AMBIENT_DIM , FACETS | INEQUALITIES , CONE_DIM failed: can't parse\ output from LattE's 'count' ==> 9 intmat N[2][3]=1,2,0, 1,0,2; polytope q = polytopeViaPoints(N); Polymake::nBoundaryLatticePoints(q); ==> polymake: WARNING: rule latte.integer_points: N_INTERIOR_LATTICE_POINTS \ : CONE_AMBIENT_DIM , FACETS | INEQUALITIES , CONE_DIM failed: can't parse\ output from LattE's 'count' ==> 2 ```