The return command passes one value to the caller. There is often a need to return multiple values. In such cases, we can return a list.<\/p>\n
Example:<\/p>\n
\r\nproc RandomNumbers {} {\r\n set r1 [expr round(100*rand())]\r\n set r2 [expr round(100*rand())]\r\n return [list $r1 $r2]\r\n}\r\nputs [RandomNumbers]\r\n<\/pre>\nResult:<\/p>\n
\r\n78 13\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"The return command passes one value to the caller. There is often a need to return multiple values. In such cases, we can return a list. Example: proc RandomNumbers {} { set r1 [expr round(100*rand())] set r2 [expr round(100*rand())] return [list $r1 $r2] } puts [RandomNumbers] Result: 78 13<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","_lmt_disableupdate":"yes","_lmt_disable":"","jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[27],"tags":[],"class_list":["post-1351","post","type-post","status-publish","format-standard","hentry","category-tcl"],"modified_by":"gantovnik","jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p8bH0k-lN","jetpack_likes_enabled":true,"jetpack-related-posts":[{"id":1047,"url":"https:\/\/gantovnik.com\/bio-tips\/2021\/11\/187-feet-to-meter-converter-using-python-tcl-tk\/","url_meta":{"origin":1351,"position":0},"title":"#187 Feet to meter converter using python tcl\/tk","author":"gantovnik","date":"2021-11-07","format":false,"excerpt":"[code language=\"python\"] package require Tk wm title . \"Feet to Meters\" grid [ttk::frame .c -padding \"3 3 12 12\"] -column 0 -row 0 -sticky nwes grid columnconfigure . 0 -weight 1; grid rowconfigure . 0 -weight 1 grid [ttk::entry .c.feet -width 7 -textvariable feet] -column 2 -row 1 -sticky we\u2026","rel":"","context":"In "tcl"","block_context":{"text":"tcl","link":"https:\/\/gantovnik.com\/bio-tips\/category\/tcl\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/gantovnik.com\/bio-tips\/wp-content\/uploads\/2021\/11\/ex187.png?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":1331,"url":"https:\/\/gantovnik.com\/bio-tips\/2022\/01\/133-create-vectors-and-planes-using-tcl-in-hypermesh-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2\/","url_meta":{"origin":1351,"position":1},"title":"#246 Create a procedure with variable number of arguments in tcl","author":"gantovnik","date":"2022-01-04","format":false,"excerpt":"An example of a procedure with variable number of arguments is [code language=\"python\"] proc avg {numbers} { set sum 0 foreach number $numbers { set sum [expr $sum + $number] } set average [expr $sum\/[llength $numbers]] return $average } puts [avg {50 50 50 60}] puts [avg {50 50 50}]\u2026","rel":"","context":"In "tcl"","block_context":{"text":"tcl","link":"https:\/\/gantovnik.com\/bio-tips\/category\/tcl\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1335,"url":"https:\/\/gantovnik.com\/bio-tips\/2022\/01\/133-create-vectors-and-planes-using-tcl-in-hypermesh-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2\/","url_meta":{"origin":1351,"position":2},"title":"#248 Create a recursive procedure in tcl","author":"gantovnik","date":"2022-01-04","format":false,"excerpt":"An example of a recursive procedure is [code language=\"python\"] proc factorial {number} { if {$number <= 1} { return 1 } return [expr $number * [factorial [expr $number - 1]]] } puts [factorial 5] puts [factorial 10] [\/code] Result: [code language=\"python\"] 120 3628800 [\/code]","rel":"","context":"In "tcl"","block_context":{"text":"tcl","link":"https:\/\/gantovnik.com\/bio-tips\/category\/tcl\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1329,"url":"https:\/\/gantovnik.com\/bio-tips\/2022\/01\/133-create-vectors-and-planes-using-tcl-in-hypermesh-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2\/","url_meta":{"origin":1351,"position":3},"title":"#245 Create a procedure with multiple arguments in tcl","author":"gantovnik","date":"2022-01-04","format":false,"excerpt":"An example for procedure with multiple arguments is [code language=\"python\"] proc add {a b} { return [expr $a+$b] } puts [add 2000 22] [\/code] Result: [code language=\"python\"] 2022 [\/code]","rel":"","context":"In "tcl"","block_context":{"text":"tcl","link":"https:\/\/gantovnik.com\/bio-tips\/category\/tcl\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":8057,"url":"https:\/\/gantovnik.com\/bio-tips\/2025\/02\/458-hypermesh-tcl-script-to-save-selected-node-ids-and-coordinates-to-a-csv-file\/","url_meta":{"origin":1351,"position":4},"title":"#458 HyperMesh tcl script to save selected node IDs and coordinates to a csv file","author":"gantovnik","date":"2025-02-20","format":false,"excerpt":"In this example, we create n=40 random nodes, select several of them, and save their node IDs and coordinates in a csv file. proc RandomReal {min max} { return [expr (rand()*($max-$min)+$min)] } set x_min 0.0 set x_max 20.0 set y_min 0.0 set y_max 10.0 set n 40 for {set i\u2026","rel":"","context":"In "HyperMesh"","block_context":{"text":"HyperMesh","link":"https:\/\/gantovnik.com\/bio-tips\/category\/hypermesh\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/gantovnik.com\/bio-tips\/wp-content\/uploads\/2025\/02\/2025-02-20_005944.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/gantovnik.com\/bio-tips\/wp-content\/uploads\/2025\/02\/2025-02-20_005944.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/gantovnik.com\/bio-tips\/wp-content\/uploads\/2025\/02\/2025-02-20_005944.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/gantovnik.com\/bio-tips\/wp-content\/uploads\/2025\/02\/2025-02-20_005944.png?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/gantovnik.com\/bio-tips\/wp-content\/uploads\/2025\/02\/2025-02-20_005944.png?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/gantovnik.com\/bio-tips\/wp-content\/uploads\/2025\/02\/2025-02-20_005944.png?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":753,"url":"https:\/\/gantovnik.com\/bio-tips\/2020\/10\/127-tcl-function-with-default-arguments\/","url_meta":{"origin":1351,"position":5},"title":"#126: tcl function with default arguments","author":"gantovnik","date":"2020-10-08","format":false,"excerpt":"#126: tcl function with default arguments [code language=\"python\"] proc add {a {b 5}} { return [expr $a+$b] } puts [add 10 12] puts [add 12] [\/code] Output: [code language=\"python\"] 22 17 [\/code]","rel":"","context":"In "tcl"","block_context":{"text":"tcl","link":"https:\/\/gantovnik.com\/bio-tips\/category\/tcl\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"_links":{"self":[{"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/posts\/1351","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/comments?post=1351"}],"version-history":[{"count":0,"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/posts\/1351\/revisions"}],"wp:attachment":[{"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/media?parent=1351"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/categories?post=1351"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/tags?post=1351"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}