{"id":134,"date":"2025-04-24T14:08:05","date_gmt":"2025-04-24T14:08:05","guid":{"rendered":"https:\/\/techkubo.com\/cpp\/?p=134"},"modified":"2025-05-27T17:45:24","modified_gmt":"2025-05-27T17:45:24","slug":"cpp-if-statement","status":"publish","type":"post","link":"https:\/\/techkubo.com\/cpp\/cpp-if-statement\/","title":{"rendered":"C++ If Statement"},"content":{"rendered":"\n<p>C++ provides several <strong>conditional statements<\/strong> that allow programs to make decisions based on logical evaluations. These conditions guide the execution of different blocks of code.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Using Conditions for Decision-Making<\/h2>\n\n\n\n<p>Programs often need to react to different situations. C++ supports logical conditions such as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><code>if<\/code><\/strong> \u2192 Runs a block <strong>only if<\/strong> the specified condition is <strong>true<\/strong>.<\/li>\n\n\n\n<li><strong><code>else<\/code><\/strong> \u2192 Runs a block <strong>if<\/strong> the <code>if<\/code> condition <strong>is false<\/strong>.<\/li>\n\n\n\n<li><strong><code>else if<\/code><\/strong> \u2192 Introduces additional conditions when the first condition fails.<\/li>\n\n\n\n<li><strong><code>switch<\/code><\/strong> \u2192 Evaluates a variable and selects a matching case.<\/li>\n<\/ul>\n\n\n\n<p>For this lesson, we\u2019ll focus <strong>only on the <code>if<\/code> statement<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Comparison Operators for Conditions<\/h2>\n\n\n\n<p>These operators help check <strong>relationships between values<\/strong>:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><strong>Operator<\/strong><\/th><th><strong>Meaning<\/strong><\/th><\/tr><\/thead><tbody><tr><td><code>&lt;<\/code><\/td><td>Less than<\/td><\/tr><tr><td><code>&lt;=<\/code><\/td><td>Less than or equal to<\/td><\/tr><tr><td><code>&gt;<\/code><\/td><td>Greater than<\/td><\/tr><tr><td><code>&gt;=<\/code><\/td><td>Greater than or equal to<\/td><\/tr><tr><td><code>==<\/code><\/td><td>Equal to<\/td><\/tr><tr><td><code>!=<\/code><\/td><td>Not equal to<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>These operators define logical conditions used in <code>if<\/code> statements.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Using if to Execute Code Conditionally<\/h2>\n\n\n\n<p>An <strong><code>if<\/code> statement<\/strong> ensures that a <strong>specific block of code runs only if<\/strong> a condition evaluates to <strong>true<\/strong>.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Syntax<\/h4>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre class=\"CodeMirror\" data-setting=\"{&quot;showPanel&quot;:true,&quot;languageLabel&quot;:&quot;language&quot;,&quot;fullScreenButton&quot;:true,&quot;copyButton&quot;:true,&quot;mode&quot;:&quot;clike&quot;,&quot;mime&quot;:&quot;text\/x-c++src&quot;,&quot;theme&quot;:&quot;material&quot;,&quot;lineNumbers&quot;:false,&quot;styleActiveLine&quot;:false,&quot;lineWrapping&quot;:false,&quot;readOnly&quot;:true,&quot;fileName&quot;:&quot;C++&quot;,&quot;language&quot;:&quot;C++&quot;,&quot;maxHeight&quot;:&quot;400px&quot;,&quot;modeName&quot;:&quot;cpp&quot;}\">if (condition) {\n    \/\/ Code executes only if condition is true\n}\n<\/pre><\/div>\n\n\n\n<p><\/p>\n\n\n\n<p><strong>Important:<\/strong> C++ is case-sensitive! Writing <code>If<\/code> or <code>IF<\/code> instead of <code>if<\/code> will <strong>cause an error<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Example: Simple <code>if<\/code> Statement<\/h2>\n\n\n\n<p>The program below checks if <strong>250 is greater than 200<\/strong>. Since the condition is <strong>true<\/strong>, the message will be displayed.<\/p>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre class=\"CodeMirror\" data-setting=\"{&quot;showPanel&quot;:true,&quot;languageLabel&quot;:&quot;language&quot;,&quot;fullScreenButton&quot;:true,&quot;copyButton&quot;:true,&quot;mode&quot;:&quot;clike&quot;,&quot;mime&quot;:&quot;text\/x-c++src&quot;,&quot;theme&quot;:&quot;material&quot;,&quot;lineNumbers&quot;:false,&quot;styleActiveLine&quot;:false,&quot;lineWrapping&quot;:false,&quot;readOnly&quot;:true,&quot;fileName&quot;:&quot;C++&quot;,&quot;language&quot;:&quot;C++&quot;,&quot;maxHeight&quot;:&quot;400px&quot;,&quot;modeName&quot;:&quot;cpp&quot;}\">#include &lt;iostream&gt;\nusing namespace std;\n\nint main() {\n    if (250 &gt; 200) {\n        cout &lt;&lt; &quot;250cc engines have more power than 200cc ones.&quot;;\n    }\n\n    return 0;\n}\n<\/pre><\/div>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Using Variables in an <code>if<\/code> Statement<\/h2>\n\n\n\n<p>Instead of comparing fixed numbers, you can use <strong>variables<\/strong>.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Example<\/h4>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre class=\"CodeMirror\" data-setting=\"{&quot;showPanel&quot;:true,&quot;languageLabel&quot;:&quot;language&quot;,&quot;fullScreenButton&quot;:true,&quot;copyButton&quot;:true,&quot;mode&quot;:&quot;clike&quot;,&quot;mime&quot;:&quot;text\/x-c++src&quot;,&quot;theme&quot;:&quot;material&quot;,&quot;lineNumbers&quot;:false,&quot;styleActiveLine&quot;:false,&quot;lineWrapping&quot;:false,&quot;readOnly&quot;:true,&quot;fileName&quot;:&quot;C++&quot;,&quot;language&quot;:&quot;C++&quot;,&quot;maxHeight&quot;:&quot;400px&quot;,&quot;modeName&quot;:&quot;cpp&quot;}\">#include &lt;iostream&gt;\nusing namespace std;\n\nint main() {\n    int horsepower1 = 500;\n    int horsepower2 = 450;\n\n    if (horsepower1 &gt; horsepower2) {\n        cout &lt;&lt; &quot;The first car has more horsepower.&quot;;\n    }\n\n    return 0;\n}\n<\/pre><\/div>\n\n\n\n<p><\/p>\n\n\n\n<p><strong>Explanation:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>horsepower1<\/code> is <strong>500<\/strong>.<\/li>\n\n\n\n<li><code>horsepower2<\/code> is <strong>450<\/strong>.<\/li>\n\n\n\n<li>Since <strong>500 is greater than 450<\/strong>, the program prints:<br><strong>&#8220;The first car has more horsepower.&#8221;<\/strong><\/li>\n<\/ul>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>C++ provides several conditional statements that allow programs to make decisions based on logical evaluations. These conditions guide the execution [&hellip;]<\/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-134","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>C++ If Statement - 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-if-statement\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C++ If Statement - C++ Tutorial\" \/>\n<meta property=\"og:description\" content=\"C++ provides several conditional statements that allow programs to make decisions based on logical evaluations. 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