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first -- first element of a list

Usage:

first L
Inputs:
- L, a list, or Sequence
Outputs:
- f, a thing, the first element of L

Description

i1 : first {a,b,c,d,e}

o1 = a

o1 : Symbol

i2 : first gens(QQ[x,y,z])

o2 = x

o2 : QQ[x..z]

See also

last -- last element of a list
take -- take some elements from a list or sequence
select -- select from a list, hash table, or string
position -- the first element of a list satisfying a condition
lists and sequences -- a detailed overview of lists and sequences in Macaulay2

For the programmer

The object first is a function closure.

The source of this document is in Macaulay2Doc/functions/first-doc.m2:27:0.