max is available as a function in [expr] or as a command in Tcl 8.5. Given a variable number of numeric arguments, it returns the one that is numerically largest.

======
% expr max(2,3,4,5,6,-99)
6

% namespace import ::tcl::mathfunc::max
% max 2 3 4 5 6 -99
6
======

This does not work in releases up to 8.5.4 because max and min are not importable. This should be fixed in subsequent versions.

[RS] 2008-09-19: Before that, you can hot-patch it yourself in one line of code:

======
namespace eval tcl::mathfunc namespace export max min ;# this is it
namespace import tcl::mathfunc::max
======

or use the full qualified name:
======
% ::tcl::mathfunc::max 2 3 4 5 6 -99
6
======

If you are working with Tcl releases older than 8.5, it is
not difficult to create procedures that provide the same
capability.

Various ways: in a loop (works for numeric and string values):
======
proc max args {
    set res [lindex $args 0]
    foreach element [lrange $args 1 end] {
        if {$element > $res} {set res $element}
    }
    return $res
}
======
By sorting (this is for numeric values only):
======
proc max args {lindex [lsort -real $args] end}
======

----
[DKF]: It was also a command and function in [TclX].
----
See also [Reinhard Max]


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!!!!!!
%|[Category Function]|[Category Mathematics]|%
!!!!!!