#  series of squares =  1.0 4.0 9.0 16.0 25.0 36.0 49.0 64.0 81.0 100.0
                      proc add {args} {return [ ::tcl::mathop::+ 0. {*}$args]}
                      add 1.0 4.0 9.0 16.0 25.0 36.0 49.0 64.0 81.0 100.0     
                     #   sum for  series of squares to n(10) is  385.0
                      add 1.0 4.0 9.0 
                      #   sum for  series of squares to n(3) is  14.0
                     add 1.0 4.0 9.0 16.0 
                     #   sum for  series of squares to n(3) is  30.0

        # pretty print from autoindent and ased editor
        # Aryabhat Sum of Squares and Cubes Series
        # written on Windows XP on eTCL
        # working under TCL version 8.5.6 and eTCL 1.0.1
        # gold on TCL WIKI, 15jan2017
        package require Tk
        package require math::numtheory
        namespace path {::tcl::mathop ::tcl::mathfunc math::numtheory }
        set tcl_precision 17
        frame .frame -relief flat -bg aquamarine4
        pack .frame -side top -fill y -anchor center
        set names {{} {number $n :} }
        lappend names {optional :}
        lappend names {optional: }
        lappend names {optional: }
        lappend names {optional:}
        lappend names {optional: }
        lappend names {sum of squares : }
        lappend names {sum of cubes :} 
        foreach i {1 2 3 4 5 6 7 8} {
            label .frame.label$i -text [lindex $names $i] -anchor e
            entry .frame.entry$i -width 35 -textvariable side$i
            grid .frame.label$i .frame.entry$i -sticky ew -pady 2 -padx 1 }
        proc about {} {
            set msg "Calculator for Aryabhat Sum of Squares and Cubes Series 
            from TCL WIKI,
            written on eTCL "
            tk_messageBox -title "About" -message $msg } 
       proc calculate {     } {
            global answer2
            global side1 side2 side3 side4 side5
            global side6 side7 side8 
            global testcase_number
            incr testcase_number 
            set side1 [* $side1 1. ]
            set side2 [* $side2 1. ]
            set side3 [* $side3 1. ]
            set side4 [* $side4 1. ]
            set side5 [* $side5 1. ]
            set side6 [* $side6 1. ]
            set side7 [* $side7 1. ]
            set side8 [* $side8 1. ] 
            set n $side1
            set sum_squares [* [* [/ 1. 6. ] $n ] [+ $n 1. ] [+ [* 2. $n ] 1. ]]
            #set sum_s [/ [* $n [+ $n 1.] ] 2. ] 
            set sum_cubes  [+ [/ [** $n 4. ] 4.] [/ [** $n 3. ] 2.] [/ [** $n 2. ] 4.]]
            set side7 $sum_squares
            set side8 $sum_cubes
                    }
        proc fillup {aa bb cc dd ee ff gg hh} {
            .frame.entry1 insert 0 "$aa"
            .frame.entry2 insert 0 "$bb"
            .frame.entry3 insert 0 "$cc"
            .frame.entry4 insert 0 "$dd"
            .frame.entry5 insert 0 "$ee"
            .frame.entry6 insert 0 "$ff" 
            .frame.entry7 insert 0 "$gg"
            .frame.entry8 insert 0 "$hh" 
             }
        proc clearx {} {
            foreach i {1 2 3 4 5 6 7 8 } {
                .frame.entry$i delete 0 end } }
        proc reportx {} {
            global side1 side2 side3 side4 side5
            global side6 side7 side8
            global testcase_number
            console show;
            puts "%|table $testcase_number|printed in| tcl wiki format|% "
            puts "&| quantity| value| comment, if any|& "
            puts "&| $testcase_number:|testcase_number | |&"
            puts "&| $side1 :|number n|   |&"
            puts "&| $side2 :|optional  | |& "  
            puts "&| $side3 :|optional | |& "
            puts "&| $side4 :|optional | |&"
            puts "&| $side5 :|optional  | |&"
            puts "&| $side6 :|optional |  |&"
            puts "&| $side7 :|sum of squares series |  |&"
            puts "&| $side8 :|sum of cubes series |  |&" 
            }
        frame .buttons -bg aquamarine4
        ::ttk::button .calculator -text "Solve" -command { calculate   }
        ::ttk::button .test2 -text "Testcase1" -command {clearx;fillup 10.0 1.  1.0 1.0  1.0  1. 385. 3025.}
        ::ttk::button .test3 -text "Testcase2" -command {clearx;fillup 3.0 1.0 1.0 1.0  1.0  1. 14. 36. }
        ::ttk::button .test4 -text "Testcase3" -command {clearx;fillup 5.0 1.  1.0 1.0  1.0  1. 55. 225. }
        ::ttk::button .clearallx -text clear -command {clearx }
        ::ttk::button .about -text about -command {about}
        ::ttk::button .cons -text report -command { reportx }
        ::ttk::button .exit -text exit -command {exit}
        pack .calculator  -in .buttons -side top -padx 10 -pady 5
        pack  .clearallx .cons .about .exit .test4 .test3 .test2   -side bottom -in .buttons
        grid .frame .buttons -sticky ns -pady {0 10}
               . configure -background aquamarine4 -highlightcolor brown -relief raised -border 30
        wm title . "Aryabhat Sum of Squares and Cubes Series Calculator"   

  puts " %| testcase $testcase_number | value| units |comment |%"
  puts " &| volume| $volume| cubic meters |based on length $side1 and width $side2   |&"