{"id":161,"date":"2025-04-28T09:56:55","date_gmt":"2025-04-28T09:56:55","guid":{"rendered":"https:\/\/techkubo.com\/cpp\/?p=161"},"modified":"2025-05-27T17:50:55","modified_gmt":"2025-05-27T17:50:55","slug":"cpp-nested-loops","status":"publish","type":"post","link":"https:\/\/techkubo.com\/cpp\/cpp-nested-loops\/","title":{"rendered":"C++ Nested Loops"},"content":{"rendered":"\n

In C++, you can place one loop inside another. This is known as a nested loop<\/strong>. Nested loops are especially useful for working with multi-layered structures<\/strong> like tables, matrices, or multi-dimensional arrays.<\/p>\n\n\n\n

<\/p>\n\n\n\n

How Nested Loops Work<\/h2>\n\n\n\n

In a nested loop setup:<\/p>\n\n\n\n

    \n
  • The outer loop<\/strong> controls the overall iterations.<\/li>\n\n\n\n
  • For each iteration<\/strong> of the outer loop, the inner loop<\/strong> runs its entire sequence.<\/li>\n<\/ul>\n\n\n\n

    <\/p>\n\n\n\n

    Syntax<\/h2>\n\n\n\n
    for (initialization; condition; update) {  \n    for (initialization; condition; update) {  \n        \/\/ Code to execute in inner loop  \n    }  \n}\n<\/pre><\/div>\n\n\n\n
    <\/p>\n\n\n\n
    Example: Showing Motorcycle Brands and Models<\/h2>\n\n\n\n
    #include <iostream>\nusing namespace std;\n\nint main() {\n    for (int brandIndex = 1; brandIndex <= 2; ++brandIndex) {  \/\/ Outer loop (brands)\n        cout << "Brand: " << brandIndex << "\\n";\n        for (int modelIndex = 1; modelIndex <= 3; ++modelIndex) {  \/\/ Inner loop (models)\n            cout << " Model: " << modelIndex << "\\n";\n        }\n    }\n\n    return 0;\n}\n<\/pre><\/div>\n\n\n\n
    <\/p>\n\n\n\n
    Explanation<\/strong><\/p>\n\n\n\n
      \n
    • The outer loop<\/strong> (brandIndex<\/code>) iterates twice, representing two brands.<\/li>\n\n\n\n
    • The inner loop<\/strong> (modelIndex<\/code>) runs three times for each brand<\/strong>.<\/li>\n\n\n\n
    • Together, the nested loop produces six outputs<\/strong>\u2014three models for each of two brands.<\/li>\n<\/ul>\n\n\n\n
      Output:<\/strong><\/p>\n\n\n\n
      Brand: 1  \n Model: 1  \n Model: 2  \n Model: 3  \nBrand: 2  \n Model: 1  \n Model: 2  \n Model: 3  \n<\/pre><\/div>\n\n\n\n
      <\/p>\n\n\n\n
      Example: Generating a Grid of Bike IDs<\/h2>\n\n\n\n
      Nested loops can also create patterns, grids, or formatted outputs.<\/p>\n\n\n\n
      #include <iostream>\nusing namespace std;\n\nint main() {\n    for (int row = 1; row <= 2; ++row) {  \/\/ Outer loop (rows)\n        for (int column = 1; column <= 3; ++column) {  \/\/ Inner loop (columns)\n            cout << "BikeID[" << row << "," << column << "] ";\n        }\n        cout << "\\n";\n    }\n\n    return 0;\n}\n<\/pre><\/div>\n\n\n\n
      <\/p>\n\n\n\n
      How It Works<\/strong><\/p>\n\n\n\n
        \n
      • The outer loop<\/strong> (row<\/code>) controls the rows (2 iterations).<\/li>\n\n\n\n
      • The inner loop<\/strong> (column<\/code>) generates the columns (3 iterations per row)<\/li>\n<\/ul>\n\n\n\n
        Output:<\/strong><\/p>\n\n\n\n
        BikeID[1,1] BikeID[1,2] BikeID[1,3]  \nBikeID[2,1] BikeID[2,2] BikeID[2,3]  \n<\/pre><\/div>\n\n\n\n
        <\/p>\n\n\n\n
        <\/p>\n","protected":false},"excerpt":{"rendered":"
        In C++, you can place one loop inside another. This is known as a nested loop. Nested loops are especially […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-161","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nC++ Nested Loops - C++ Tutorial<\/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:\/\/techkubo.com\/cpp\/cpp-nested-loops\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C++ Nested Loops - C++ Tutorial\" \/>\n<meta property=\"og:description\" content=\"In C++, you can place one loop inside another. 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