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substring -- extract part of a string

Description

Synopsis

  • Usage:
    substring(i,n,s)
    substring(s,i,n)
    substring((i,n),s)
  • Inputs:
  • Outputs:
    • the substring of the string s starting at position i with length n

Synopsis

  • Usage:
    substring(i,s)
    substring(s,i)
  • Inputs:
  • Outputs:
    • the substring of the string s starting at position i and continuing to the end of the string

Positions are numbered starting at 0.

If the starting position i is negative, it means to start at a position obtained by counting backward from the end of the string.

Requests for character positions out of bounds are silently ignored.

Ways to use substring :