{"id":9758,"date":"2025-08-29T15:00:23","date_gmt":"2025-08-29T09:30:23","guid":{"rendered":"https:\/\/namastedev.com\/blog\/?p=9758"},"modified":"2025-10-22T20:22:15","modified_gmt":"2025-10-22T14:52:15","slug":"linear-search_","status":"publish","type":"post","link":"https:\/\/namastedev.com\/blog\/linear-search_\/","title":{"rendered":"Linear Search"},"content":{"rendered":"\n<!-- PrismJS for Syntax Highlighting -->\n<link href=\"https:\/\/cdn.jsdelivr.net\/npm\/prismjs@1.29.0\/themes\/prism-tomorrow.min.css\" rel=\"stylesheet\">\n<script src=\"https:\/\/cdn.jsdelivr.net\/npm\/prismjs@1.29.0\/prism.min.js\"><\/script>\n<script src=\"https:\/\/cdn.jsdelivr.net\/npm\/prismjs@1.29.0\/plugins\/autoloader\/prism-autoloader.min.js\"><\/script>\n\n<style>\n.wp_blog_theme {\n  --primary: #E58C32;\n  --secondary: #030302;\n  --light-bg: #fef9f4;\n  --text-dark: #2d2d2d;\n  --tab-radius: 12px;\n  --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);\n  --code-bg: #001f3f;\n  --code-text: #d4f1ff;\n}\n\n.wp_blog_container {\n  font-family: 'Segoe UI', sans-serif;\n  background: var(--light-bg);\n  margin: 0;\n  padding: 0;\n  color: var(--text-dark);\n}\n\n\/* Heading *\/\n.wp_blog_main-heading {\n  text-align: center;\n  font-size: 2.4rem;\n  color: var(--primary);\n  margin-top: 2.5rem;\n  font-weight: bold;\n}\n\n\/* Explanation Card *\/\n.wp_blog_explanation,\n.wp_blog_code-tabs-container {\n  max-width: 940px;\n  margin: 2rem auto;\n  padding: 2rem;\n  background: white;\n  border-radius: var(--tab-radius);\n  box-shadow: var(--shadow);\n}\n\n\/* Text and Visuals *\/\n.wp_blog_explanation h2 {\n  font-size: 1.4rem;\n  color: var(--primary);\n  margin-bottom: 0.5rem;\n}\n\n.wp_blog_explanation p,\n.wp_blog_explanation li {\n  font-size: 1.05rem;\n  line-height: 1.7;\n  margin: 0.5rem 0;\n}\n\n.wp_blog_explanation code {\n  background: #fef9f4;   \/* light bg instead of dark blue *\/\n  color: #E58C32;        \/* brand orange *\/\n  padding: 3px 6px;\n  border-radius: 4px;\n  font-family: 'Courier New', monospace;\n  font-weight: 600;      \/* optional, makes it pop *\/\n}\n\n.wp_blog_explanation img {\n  max-width: 100%;\n  border-radius: var(--tab-radius);\n  margin-top: 1rem;\n  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);\n}\n\n\/* Tab Buttons *\/\n.wp_blog_code-tabs-header {\n  display: flex;\n  flex-wrap: wrap;\n  gap: 0.5rem;\n  margin-bottom: 1rem;\n}\n\n.wp_blog_code-tab-button {\n  padding: 0.6rem 1.2rem;\n  border: 1px solid var(--primary);\n  background: white;\n  color: var(--primary);\n  border-radius: 50px;\n  font-weight: 600;\n  cursor: pointer;\n  transition: all 0.3s ease;\n}\n\n.wp_blog_code-tab-button:hover {\n  background: var(--secondary);\n}\n\n.wp_blog_code-tab-button.active {\n  background: var(--primary);\n  color: white;\n}\n\n\/* Code Content *\/\n.wp_blog_code-tab-content {\n  display: none;\n  background: var(--code-bg);\n  border-radius: var(--tab-radius);\n}\n\n.wp_blog_code-tab-content.active {\n  display: block;\n}\n\n.wp_blog_code-tab-content pre {\n  margin: 0;\n  padding: 1.5rem;\n  font-size: 1rem;\n  overflow-x: auto;\n  background: var(--code-bg);\n  border-radius: var(--tab-radius);\n  color: var(--code-text);\n}\n\n\/* Dark mode variables *\/\n.wp_blog_theme.dark-mode {\n  --light-bg: #121212;\n  --text-dark: #f5f5f5;\n  --shadow: 0 4px 12px rgba(255, 255, 255, 0.08);\n  --code-bg: #1e1e1e;\n  --code-text: #c5f0ff;\n}\n\n.wp_blog_theme.dark-mode .wp_blog_explanation {\n  background: #1e1e1e;\n}\n\n\/* Dark mode code highlight *\/\n.wp_blog_theme.dark-mode .wp_blog_explanation code {\n  background: #333;\n  color: #ffd27f;\n}\n\n.wp_blog_theme {\n  position: relative; \/* makes it the reference for absolute children *\/\n}\n\n.wp_blog_toggle-btn {\n  position: absolute;\n  top: 1rem;\n  right: 1rem;\n  z-index: 9999;\n  padding: 0.5rem 0.8rem;\n  border-radius: 10%;\n  background: var(--primary);\n  color: white;\n  font-weight: bold;\n  cursor: pointer;\n  border: none;\n  box-shadow: var(--shadow);\n  transition: background 0.3s, transform 0.2s;\n}\n\n.wp_blog_toggle-btn:hover {\n  background: #cc772e;\n}\n\n.wp_blog_theme.dark-mode .wp_blog_code-tabs-container {\n  background: #1e1e1e;\n}\n<\/style>\n\n<div class=\"wp_blog_container wp_blog_theme\">\n        <button id=\"blogNotesThemeToggle\" class=\"wp_blog_toggle-btn\">\ud83c\udf19<\/button>\n\n<h1 class=\"wp_blog_main-heading\"><\/h1>\n\n<div class=\"wp_blog_explanation\">\n\n    <h2>Linear Search<\/h2>\n    <p><code>Linear Search is a simple search algorithm<\/code> <strong>used to find a specific element in an array<\/strong>. It checks each element of the array one by one until the <strong>target value is found<\/strong> or the <code>end of the array<\/code> is reached.<\/p>\n   \n    <h2>Example 1:<\/h2>\n    <p><strong>Input:<\/strong> arr = [2, 4, 7, 10], target = 10<\/p>\n    <p><strong>Output:<\/strong> 3<\/p>\n    <p><strong>Explanation: <\/strong>10 is found at index 3<\/p>\n\n    <h2>Example 2:<\/h2>\n    <p><strong>Input:<\/strong> arr = [6, 8, 0, 3], target = 5<\/p>\n    <p><strong>Output:<\/strong> -1<\/p>\n    <p><strong>Explanation: <\/strong>5 is not present in the array<\/p>\n\n\n    <h2>Approach:<\/h2>\n    <ul>\n        <li><code>Start<\/code> from the <strong>first element<\/strong> of the array.<\/li>\n        <li><strong>Compare the current element<\/strong> with the <code>target<\/code> value.<\/li>\n        <li>If a match is found, <code>return the index<\/code>.<\/li>\n        <li>If the loop ends without finding the target, <code>return -1<\/code>.<\/li>\n    <\/ul>\n\n    <h2>Time &#038; Space Complexity:<\/h2>\n    <p><strong>Time Complexity: O(n)<\/strong>  where n is the size of the array.\n    <ul>\n        <li> In the worst case, the algorithm traverses the entire array.<\/li>\n        <li> Each element is checked exactly once.<\/li>\n    <\/ul>\n    <\/p>\n    <p><strong>Space Complexity: O(1)<\/strong> <code>Constant Space<\/code><\/p>\n\n<h2>Dry Run<\/h2>\n<div style=\"background: var(--light-bg); border-left: 4px solid var(--primary); padding: 1rem; border-radius: var(--tab-radius); margin: 1rem 0; color: var(--text-dark);\">\n  <p><strong>Input:<\/strong> <code>arr = [4, 5, 1, 3, 9], target = 5<\/code><\/p> \n  \n  <pre style=\"white-space: pre-wrap; background: var(--code-bg); padding: 1rem; border-radius: 8px; overflow-x: auto; color: var(--code-text);\">\ni = 0, arr[i] = 4\n   \u2192 4 == 5 ? No\n\ni = 1, arr[i] = 5\n   \u2192 5 == 5 ? Yes \u2192 return 1\n\nLoop breaks here since target found.\n  <\/pre> \n  \n  <p><strong>Output:<\/strong> <code>Element found at index 1<\/code><\/p> \n<\/div>\n\n<\/div>\n\n<div class=\"wp_blog_code-tabs-container\">\n    <div class=\"wp_blog_code-tabs-header\">\n        <button class=\"wp_blog_code-tab-button active\" data-lang=\"js\">\n            JavaScript\n        <\/button>\n        <button class=\"wp_blog_code-tab-button\" data-lang=\"py\">Python<\/button>\n        <button class=\"wp_blog_code-tab-button\" data-lang=\"java\">Java<\/button>\n        <button class=\"wp_blog_code-tab-button\" data-lang=\"cpp\">C++<\/button>\n        <button class=\"wp_blog_code-tab-button\" data-lang=\"c\">C<\/button>\n        <button class=\"wp_blog_code-tab-button\" data-lang=\"cs\">C#<\/button>\n    <\/div>\n\n    <div class=\"wp_blog_code-tab-content active\" data-lang=\"js\">\n        <pre><code class=\"language-javascript\">\nlet arr = [4, 5, 1, 3, 9];\n  \n  function linearSearch(arr, target) {\n    for (let i = 0; i < arr.length; i++) {\n      if (arr[i] == target) {\n        return i;\n      }\n    }\n    return -1;\n  }\n  \n  let result = linearSearch(arr, 5);\n  console.log(\"Element found at index\", result);\n    <\/code><\/pre>\n    <\/div>\n    <div class=\"wp_blog_code-tab-content\" data-lang=\"py\">\n        <pre><code class=\"language-python\">\ndef linear_search(arr, target):\n      for i in range(len(arr)):\n          if arr[i] == target:\n              return i\n      return -1\n  \n  arr = [4, 5, 1, 3, 9]\n  result = linear_search(arr, 5)\n  print(\"Element found at index\", result)\n    <\/code><\/pre>\n    <\/div>\n    <div class=\"wp_blog_code-tab-content\" data-lang=\"java\">\n        <pre><code class=\"language-java\">\npublic class Solution {\n    public static int linearSearch(int[] arr, int target) {\n      for (int i = 0; i < arr.length; i++) {\n        if (arr[i] == target) {\n          return i;\n        }\n      }\n      return -1;\n    }\n  \n    public static void main(String[] args) {\n      int[] arr = {4, 5, 1, 3, 9};\n      int result = linearSearch(arr, 5);\n      System.out.println(\"Element found at index \" + result);\n    }\n  }\n<\/code><\/pre>\n    <\/div>\n    <div class=\"wp_blog_code-tab-content\" data-lang=\"cpp\">\n        <pre><code class=\"language-cpp\">\n#include &lt;iostream&gt;\n  using namespace std;\n  \n  int linearSearch(int arr[], int size, int target) {\n    for (int i = 0; i < size; i++) {\n      if (arr[i] == target) {\n        return i;\n      }\n    }\n    return -1;\n  }\n  \n  int main() {\n    int arr[] = {4, 5, 1, 3, 9};\n    int result = linearSearch(arr, 5, 5);\n    cout << \"Element found at index \" << result << endl;\n    return 0;\n  }\n   \n    <\/code><\/pre>\n    <\/div>\n\n    <div class=\"wp_blog_code-tab-content\" data-lang=\"c\">\n        <pre><code class=\"language-c\">\n#include &lt;stdio.h&gt;\n  int linearSearch(int arr[], int size, int target) {\n    for (int i = 0; i < size; i++) {\n      if (arr[i] == target) {\n        return i;\n      }\n    }\n    return -1;\n  }\n  \n  int main() {\n    int arr[] = {4, 5, 1, 3, 9};\n    int size = sizeof(arr) \/ sizeof(arr[0]);\n    int result = linearSearch(arr, size, 5);\n    printf(\"Element found at index %d\\n\", result);\n    return 0;\n  }\n<\/code><\/pre>\n    <\/div>\n    <div class=\"wp_blog_code-tab-content\" data-lang=\"cs\">\n        <pre><code class=\"language-csharp\">\nusing System;\nclass Program\n{\n    \/\/ Linear Search function\n    static int LinearSearch(int[] arr, int target)\n    {\n        for (int i = 0; i < arr.Length; i++)\n        {\n            if (arr[i] == target)\n            {\n                return i; \/\/ return index if element found\n            }\n        }\n        return -1; \/\/ if element not found\n    }\n    static void Main()\n    {\n        int[] arr = { 4, 5, 1, 3, 9 };\n        int target = 5;\n        int result = LinearSearch(arr, target);\n        Console.WriteLine(\"Element found at index \" + result);\n    }\n}\n  <\/code><\/pre>\n    <\/div>\n<\/div>\n<\/div>\n<script>\ndocument.addEventListener(\"DOMContentLoaded\", () => {\n  const buttons = document.querySelectorAll(\".wp_blog_code-tab-button\");\n  const contents = document.querySelectorAll(\".wp_blog_code-tab-content\");\n\n  buttons.forEach((button) => {\n    button.addEventListener(\"click\", () => {\n      const lang = button.getAttribute(\"data-lang\");\n\n      buttons.forEach((btn) => btn.classList.remove(\"active\"));\n      contents.forEach((content) => content.classList.remove(\"active\"));\n\n      button.classList.add(\"active\");\n      document\n        .querySelector(`.wp_blog_code-tab-content[data-lang=\"${lang}\"]`)\n        .classList.add(\"active\");\n    });\n  });\n\n  const themeToggle = document.getElementById(\"blogNotesThemeToggle\");\n  const themeContainer = document.querySelector(\".wp_blog_theme\");\n\n  themeToggle.addEventListener(\"click\", () => {\n    themeContainer.classList.toggle(\"dark-mode\");\n    themeToggle.textContent =\n      themeContainer.classList.contains(\"dark-mode\") ? \"\u2600\ufe0f\" : \"\ud83c\udf19\";\n  });\n});\n<\/script>\n\n","protected":false},"excerpt":{"rendered":"<p>\ud83c\udf19 Linear Search Linear Search is a simple search algorithm used to find a specific element in an array. It checks each element of the array one by one until the target value is found or the end of the array is reached. Example 1: Input: arr = [2, 4, 7, 10], target = 10<\/p>\n","protected":false},"author":108,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[322,260,176,175,211,811,810,174,172,173],"tags":[],"class_list":["post-9758","post","type-post","status-publish","format-standard","category-algorithms-and-data-structures","category-c-c-plus-plus","category-csharp","category-cplusplus","category-data-structures","category-data-structures-and-algorithms","category-dsa","category-java","category-javascript","category-python"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/namastedev.com\/blog\/wp-json\/wp\/v2\/posts\/9758","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/namastedev.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/namastedev.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/namastedev.com\/blog\/wp-json\/wp\/v2\/users\/108"}],"replies":[{"embeddable":true,"href":"https:\/\/namastedev.com\/blog\/wp-json\/wp\/v2\/comments?post=9758"}],"version-history":[{"count":4,"href":"https:\/\/namastedev.com\/blog\/wp-json\/wp\/v2\/posts\/9758\/revisions"}],"predecessor-version":[{"id":10542,"href":"https:\/\/namastedev.com\/blog\/wp-json\/wp\/v2\/posts\/9758\/revisions\/10542"}],"wp:attachment":[{"href":"https:\/\/namastedev.com\/blog\/wp-json\/wp\/v2\/media?parent=9758"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/namastedev.com\/blog\/wp-json\/wp\/v2\/categories?post=9758"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/namastedev.com\/blog\/wp-json\/wp\/v2\/tags?post=9758"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}