• Top
  • Documentation
  • Books
  • Boolean-reasoning
  • Projects
  • Debugging
  • Std
  • Proof-automation
  • Macro-libraries
  • ACL2
    • Theories
    • Rule-classes
    • Proof-builder
    • Recursion-and-induction
    • Hons-and-memoization
    • Events
    • Parallelism
    • History
    • Programming
      • Defun
      • Declare
      • System-utilities
      • Stobj
      • State
      • Mutual-recursion
      • Memoize
      • Mbe
      • Io
      • Defpkg
      • Apply$
      • Loop$
      • Programming-with-state
      • Arrays
      • Characters
      • Time$
      • Defmacro
      • Loop$-primer
      • Fast-alists
      • Defconst
      • Evaluation
      • Guard
      • Equality-variants
      • Compilation
      • Hons
      • ACL2-built-ins
      • Developers-guide
      • System-attachments
      • Advanced-features
      • Set-check-invariant-risk
      • Numbers
      • Efficiency
      • Irrelevant-formals
      • Introduction-to-programming-in-ACL2-for-those-who-know-lisp
      • Redefining-programs
      • Lists
        • Member
        • Append
        • List
        • Nth
          • Std/lists/nth
          • Nth-aliases-table
          • Equal-by-nths
          • First
          • Rest
          • Third
          • Tenth
          • Sixth
          • Seventh
          • Second
          • Ninth
          • Fourth
          • Fifth
          • Eighth
        • Len
        • True-listp
        • String-listp
        • Nat-listp
        • Character-listp
        • Symbol-listp
        • True-list-listp
        • Length
        • Search
        • Intersection$
        • Union$
        • Remove-duplicates
        • Position
        • Update-nth
        • Take
        • Nthcdr
        • Set-difference$
        • Subsetp
        • No-duplicatesp
        • Concatenate
        • Remove
        • Remove1
        • Intersectp
        • Endp
        • Keyword-value-listp
        • Integer-listp
        • Reverse
        • Add-to-set
        • List-utilities
        • Set-size
        • Revappend
        • Subseq
        • Make-list
        • Last
        • Lists-light
        • Boolean-listp
        • Butlast
        • Pairlis$
        • Substitute
        • Count
        • Keyword-listp
        • List*
        • Eqlable-listp
        • Pos-listp
        • Integer-range-listp
        • Rational-listp
        • Evens
        • Atom-listp
        • ACL2-number-listp
        • Typed-list-utilities
        • Odds
        • List$
        • Listp
        • Standard-char-listp
        • Last-cdr
        • Pairlis
        • Proper-consp
        • Improper-consp
        • Pairlis-x2
        • Pairlis-x1
        • Merge-sort-lexorder
        • Fix-true-list
        • Real-listp
      • Invariant-risk
      • Errors
      • Defabbrev
      • Conses
      • Alists
      • Set-register-invariant-risk
      • Strings
      • Program-wrapper
      • Get-internal-time
      • Basics
      • Packages
      • Oracle-eval
      • Defmacro-untouchable
      • <<
      • Primitive
      • Revert-world
      • Unmemoize
      • Set-duplicate-keys-action
      • Symbols
      • Def-list-constructor
      • Easy-simplify-term
      • Defiteration
      • Fake-oracle-eval
      • Defopen
      • Sleep
    • Operational-semantics
    • Real
    • Start-here
    • Debugging
    • Miscellaneous
    • Output-controls
    • Macros
    • Interfacing-tools
  • Interfacing-tools
  • Hardware-verification
  • Software-verification
  • Math
  • Testing-utilities

• Nth
• ACL2-built-ins

Fifth

Fifth member of the list

See any Common Lisp documentation for details.