Access Functions

# S : List -> RngIntElt
The length of the list S.
IsEmpty(S) : List -> BoolElt
Return whether S is empty (has zero length).
S[i] : List, RngIntElt -> Elt
Return the i-th term of the list S. If either i ≤0 or i > #S + 1, then an error results. Here i is allowed to be a multi-index (see Section Multi-indexing for the interpretation).
S[I] : List, [RngIntElt] -> List
Return the sublist of S given by the indices in the sequence I. Each index in I must be in the range [1..l], where l is the length of S.
IsDefined(L, i) : List, RngIntElt -> Elt
Checks whether the ith item in L is defined or not, that is it returns true if i is at most the length of L and false otherwise.
V2.28, 13 July 2023