len |
Syntax |
len(E:STRING or LIST or RINGELEM):INT |
Description |
---------------------------------------------- | type | length | -----------------------------------------------| | INT | 1 | | LIST | number of items in the list | | MODULE | length of Gens(E) | | POLY | number of monomials | | VECTOR | number of components | ---------------------------------------------- The operator len
Example |
/**/ Use R ::= QQ[x,y]; /**/ L := ["a",2,3,[4,5]]; /**/ len(L); 4 /**/ len(L[1]); 1 /**/ len(L[4]); 2 /**/ F := x^2 + x*y + y^2 + x*y^4; /**/ len(F); 4 /**/ NumTerms(F); --> is the same of len(F)! 4 /**/ len((x+y) - (x*y/x)); 1 /**/ A := mat([[1,2],[3,4],[5,6]]); /**/ len(A); ERROR: len(Matrix) not allowed, use NumRows(matrix) instead /**/ NumRows(A); 3 |
See Also |