linsert manual page - Tcl Built-In Commands

## Tcl8.5.15/Tk8.5.15 Documentation > TclCmd > linsert

### Tcl/Tk Applications | Tcl Commands | Tk Commands | Tcl Library | Tk Library

### NAME

linsert - Insert elements into a list

### SYNOPSIS

linsert list index element ?element element ...?

### DESCRIPTION

This command produces a new list from list by inserting all of the element arguments just before the index'th element of list. Each element argument will become a separate element of the new list. If index is less than or equal to zero, then the new elements are inserted at the beginning of the list. The interpretation of the index value is the same as for the command string index, supporting simple index arithmetic and indices relative to the end of the list.

### EXAMPLE

Putting some values into a list, first indexing from the start and then indexing from the end, and then chaining them together:

    set oldList {the fox jumps over the dog}
    set midList [linsert $oldList 1 quick]
    set newList [linsert $midList end-1 lazy]
    # The old lists still exist though...
    set newerList [linsert [linsert $oldList end-1 quick] 1 lazy]

### SEE ALSO

list, lappend, lindex, llength, lsearch, lset, lsort, lrange, lreplace, string

### KEYWORDS

element, insert, list
Copyright © 1995-1997 Roger E. Critchlow Jr. Copyright © 1993 The Regents of the University of California. Copyright © 1994-1996 Sun Microsystems, Inc. Copyright © 2001 Kevin B. Kenny <kennykb(at)acm.org>. All rights reserved.