{"id":327,"date":"2021-09-03T19:59:31","date_gmt":"2021-09-03T19:59:31","guid":{"rendered":"https:\/\/lgildv5i97.onrocket.site\/answers\/windows-2000-dos-batch-lang-env-var-bug-65710-html"},"modified":"2021-09-03T19:59:31","modified_gmt":"2021-09-03T19:59:31","slug":"windows-2000-dos-batch-lang-env-var-bug-65710-html","status":"publish","type":"question","link":"https:\/\/computing.net\/answers\/windows-2000\/dos-batch-lang-env-var-bug\/65710.html","title":{"rendered":"Dos Batch Lang. Env Var Bug"},"content":{"rendered":"<td>\n<p>I would like to see someone explain this IN DETAIL. <\/p>\n<p>DOS command prompt in Windoze 2000:<\/p>\n<p>set var2=<\/p>\n<p>set \/a var1=%var2%+1<\/p>\n<p>(produces a &#8216;missing operand&#8217; error)<\/p>\n<p>BUT<\/p>\n<p>set \/a var1=+1<\/p>\n<p>of course sets var1 equal to 1 with no error<\/p>\n<p>In a windoze command prompt an environment variable that <br \/>doesn&#8217;t exist is suppose to resolve to null in an expression. <\/p>\n<p>Not sure if this is repeatable in XP<br \/>or true DOS. Please comment thanks. <\/p>\n<\/p>\n<\/td>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","template":"","meta":{"inline_featured_image":false,"iawp_total_views":4},"question-category":[],"question_tags":[],"class_list":["post-327","question","type-question","status-publish","hentry"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/computing.net\/answers\/wp-json\/wp\/v2\/question\/327","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/computing.net\/answers\/wp-json\/wp\/v2\/question"}],"about":[{"href":"https:\/\/computing.net\/answers\/wp-json\/wp\/v2\/types\/question"}],"author":[{"embeddable":true,"href":"https:\/\/computing.net\/answers\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/computing.net\/answers\/wp-json\/wp\/v2\/comments?post=327"}],"wp:attachment":[{"href":"https:\/\/computing.net\/answers\/wp-json\/wp\/v2\/media?parent=327"}],"wp:term":[{"taxonomy":"question-category","embeddable":true,"href":"https:\/\/computing.net\/answers\/wp-json\/wp\/v2\/question-category?post=327"},{"taxonomy":"question_tags","embeddable":true,"href":"https:\/\/computing.net\/answers\/wp-json\/wp\/v2\/question_tags?post=327"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}