String _ ZZ -- get element from string

Synopsis

• Operator: _

• Usage:

  s_i

• Inputs:
  • s, a string
  • i, an integer
• Outputs:
  • a string, the i-th character of the string s

Description

The characters are numbered starting with 0. If i is negative, then the i-th entry counting from the end is provided. If i is out of range, an error is signaled.

i1 : s = "what are you thinking?"

o1 = what are you thinking?

i2 : #s

o2 = 22

i3 : s_-1, s_19, s_0

o3 = (?, n, w)

o3 : Sequence

See also

• strings and nets -- an overview of strings and nets in Macaulay2
• String # ZZ -- get value from list, hash table, database, or string