first -- first element of a list

Synopsis

• 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