NAME<\/a> ______________________________________________________________________________<\/p>\n if \u2212 Execute scripts conditionally<\/p>\n if<\/b> expr1<\/i> ?then<\/b>? body1<\/i> elseif<\/b> expr2<\/i> ?then<\/b>? body2<\/i> elseif<\/b> … ?else<\/b>? ?bodyN<\/i>? ______________________________________________________________________________<\/p>\n The if<\/i> command evaluates expr1<\/i> as an expression (in the same way that expr<\/b> evaluates its argument). The value of the expression must be a boolean (a numeric value, where 0 is false and anything is true, or a string value such as true<\/b> or yes<\/b> for true and false<\/b> or no<\/b> for false); if it is true then body1<\/i> is executed by passing it to the Tcl interpreter. Otherwise expr2<\/i> is evaluated as an expression and if it is true then body2<\/b> is executed, and so on. If none of the expressions evaluates to true then bodyN<\/i> is executed. The then<\/b> and else<\/b> arguments are optional \u201cnoise words\u201d to make the command easier to read. There may be any number of elseif<\/b> clauses, including zero. BodyN<\/i> may also be omitted as long as else<\/b> is omitted too. The return value from the command is the result of the body script that was executed, or an empty string if none of the expressions was non-zero and there was no bodyN<\/i>.<\/p>\n A simple conditional:<\/p>\n if<\/b> {$vbl == 1} { puts “vbl is one” }<\/p>\n With an else<\/b>-clause:<\/p>\n if<\/b> {$vbl == 1} { With an elseif<\/b>-clause too:<\/p>\n if<\/b> {$vbl == 1} { Remember, expressions can be multi-line, but in that case it can be a good idea to use the optional then<\/b> keyword for clarity:<\/p>\n if<\/b> { expr(n), for(n), foreach(n)<\/p>\n boolean, conditional, else, false, if, true<\/p>\n if \u2212 Execute scripts conditionally <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3783,1],"tags":[2702,2635],"class_list":["post-6025","post","type-post","status-publish","format-standard","hentry","category-n-comandos-tcl-tk","category-sin-categoria","tag-if","tag-mann"],"gutentor_comment":0,"_links":{"self":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts\/6025","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/comments?post=6025"}],"version-history":[{"count":0,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts\/6025\/revisions"}],"wp:attachment":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/media?parent=6025"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/categories?post=6025"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/tags?post=6025"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
SYNOPSIS<\/a>
DESCRIPTION<\/a>
EXAMPLES<\/a>
SEE ALSO<\/a>
KEYWORDS<\/a> <\/p>\n
\nNAME <\/a> <\/h2>\n
SYNOPSIS <\/a> <\/h2>\n
DESCRIPTION <\/a> <\/h2>\n
EXAMPLES <\/a> <\/h2>\n
puts “vbl is one”
} else<\/b> {
puts “vbl is not one”
}<\/p>\n
puts “vbl is one”
} elseif<\/b> {$vbl == 2} {
puts “vbl is two”
} else<\/b> {
puts “vbl is not one or two”
}<\/p>\n
$vbl == 1
|| $vbl == 2
|| $vbl == 3
} then<\/b> {
puts “vbl is one, two or three”
}<\/p>\nSEE ALSO <\/a> <\/h2>\n
KEYWORDS <\/a> <\/h2>\n
\n","protected":false},"excerpt":{"rendered":"