How to get value from a list in Tcl?

Question

I have a list in Tcl as:

set list1 {0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, 0x9}

then how could I get the element based on the index of list? for example:

I want to get the second element of this list? or the sixth one of this list?

Answer 1

Just use split and loop?

foreach n [split $list1 ","] {
    puts [string trim $n]  ;# Trim to remove the extra space after the comma
}

[split $list1 ","] returns a list containing 0x1 { 0x2} { 0x3} { 0x4} { 0x5} { 0x6} { 0x7} { 0x8} { 0x9}

The foreach loop iterates over each element of the list and assign the current element to $n.

[string trim $n] then removes trailing spaces (if any) and puts prints the result.

---

EDIT:

To get the nth element of the list, use the lindex function:

% puts [lindex $list1 1]
0x2
% puts [lindex $list1 5]
0x6

The index is 0-based, so you have to remove 1 from the index you need to pull from the list.