{"id":31418,"date":"2023-01-21T08:39:25","date_gmt":"2023-01-21T03:09:25","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-for-loop-added-when-i-use-minus-and-subtracted-when-i-use-plus\/"},"modified":"2023-01-21T08:39:25","modified_gmt":"2023-01-21T03:09:25","slug":"solved-for-loop-added-when-i-use-minus-and-subtracted-when-i-use-plus","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-for-loop-added-when-i-use-minus-and-subtracted-when-i-use-plus\/","title":{"rendered":"[Solved] “for” loop added when I use minus and subtracted when I use plus"},"content":{"rendered":"

[ad_1]
\n<\/p>\n

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<\/div>\n
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So the situation is a loop like this:<\/p>\n

for (rows = columns + 1; rows < height; rows++) {\n     \/\/ do something\n}\n<\/code><\/pre>\n
I think you’re asking why the loop executes fewer times when the loop says for (rows = columns + 1;...<\/code> than when it says for (rows = columns - 1;...<\/code>. The reason is that the first part of a for<\/code> loop is the initial condition; it’s where you give rows<\/code> it’s starting value. If you add<\/em> 1 to the starting value, and then count up<\/em> to some final value (height<\/code> in this case), then you’ve decreased<\/em> the difference between the starting value and the final value.<\/p>\n
Consider this:<\/p>\n
height = 3;\nfor (rows = 1; rows < height; rows++) {...}\n<\/code><\/pre>\n
versus this:<\/p>\n
height = 3;\nfor (rows = -1; rows < height; rows++) {...}\n<\/code><\/pre>\n
Which one of those loops do you suppose will execute more times?<\/p>\n<\/p><\/div>\n
<\/div>\n<\/div>\n
            1<\/span> <\/p><\/div>\n<\/div>\n
[ad_2]<\/p>\n
solved “for” loop added when I use minus and subtracted when I use plus <\/p>\n","protected":false},"excerpt":{"rendered":"
[ad_1] So the situation is a loop like this: for (rows = columns + 1; rows < height; rows++) { \/\/ do something } I think you’re asking why the loop executes fewer times when the loop says for (rows = columns + 1;… than when it says for (rows = columns – 1;…. The … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[324,816,391],"class_list":["post-31418","post","type-post","status-publish","format-standard","hentry","category-solved","tag-c","tag-cs50","tag-loops"],"yoast_head":"\n[Solved] "for" loop added when I use minus and subtracted when I use plus - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-for-loop-added-when-i-use-minus-and-subtracted-when-i-use-plus\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] "for" loop added when I use minus and subtracted when I use plus - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] So the situation is a loop like this: for (rows = columns + 1; rows < height; rows++) { \/\/ do something } I think you’re asking why the loop executes fewer times when the loop says for (rows = columns + 1;... than when it says for (rows = columns - 1;.... The ... Read more\" \/>\n<meta property=\"og:url\" content=\"https:\/\/jassweb.com\/solved\/solved-for-loop-added-when-i-use-minus-and-subtracted-when-i-use-plus\/\" \/>\n<meta property=\"og:site_name\" content=\"JassWeb\" \/>\n<meta property=\"article:published_time\" content=\"2023-01-21T03:09:25+00:00\" \/>\n<meta name=\"author\" content=\"Kirat\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Kirat\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/jassweb.com\/solved\/solved-for-loop-added-when-i-use-minus-and-subtracted-when-i-use-plus\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/jassweb.com\/solved\/solved-for-loop-added-when-i-use-minus-and-subtracted-when-i-use-plus\/\"},\"author\":{\"name\":\"Kirat\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31\"},\"headline\":\"[Solved] “for” loop added when I use minus and subtracted when I use plus\",\"datePublished\":\"2023-01-21T03:09:25+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/jassweb.com\/solved\/solved-for-loop-added-when-i-use-minus-and-subtracted-when-i-use-plus\/\"},\"wordCount\":128,\"publisher\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#organization\"},\"keywords\":[\"c++\",\"cs50\",\"loops\"],\"articleSection\":[\"Solved\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/jassweb.com\/solved\/solved-for-loop-added-when-i-use-minus-and-subtracted-when-i-use-plus\/\",\"url\":\"https:\/\/jassweb.com\/solved\/solved-for-loop-added-when-i-use-minus-and-subtracted-when-i-use-plus\/\",\"name\":\"[Solved] \\\"for\\\" loop added when I use minus and subtracted when I use plus - 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