{"id":114436,"date":"2025-12-17T12:13:25","date_gmt":"2025-12-17T06:43:25","guid":{"rendered":"https:\/\/www.mygreatlearning.com\/blog\/?page_id=114436"},"modified":"2025-12-17T11:40:00","modified_gmt":"2025-12-17T06:10:00","slug":"pyramid-pattern-printing-program","status":"publish","type":"page","link":"https:\/\/www.mygreatlearning.com\/blog\/python-exercise\/pyramid-pattern-printing-program\/","title":{"rendered":"Pattern Printing Program in Python"},"content":{"rendered":"\n<link rel=\"stylesheet\" href=\"https:\/\/cdnjs.cloudflare.com\/ajax\/libs\/codemirror\/5.65.16\/codemirror.min.css\" \/>\n<link rel=\"stylesheet\" href=\"https:\/\/cdnjs.cloudflare.com\/ajax\/libs\/codemirror\/5.65.16\/theme\/eclipse.min.css\" \/>\n<link rel=\"stylesheet\" href=\"https:\/\/cdnjs.cloudflare.com\/ajax\/libs\/font-awesome\/6.4.0\/css\/all.min.css\">\n\n<style>\n    \/* Wrapper to protect styles *\/\n    .py-receipt-wrapper {\n        \/* Local CSS Variables *\/\n        --py-bg-app: #f9fafb;\n        --py-bg-panel: #ffffff;\n        --py-border: #e5e7eb;\n        --py-text-primary: #1f2937;\n        --py-text-secondary: #6b7280;\n        --py-primary-blue: #2563eb;\n        --py-primary-hover: #1d4ed8;\n        --py-header-height: 50px;\n        --py-footer-height: 60px;\n\n        font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, sans-serif;\n        background-color: var(--py-bg-app);\n        color: var(--py-text-primary);\n        width: 100%;\n        border: 1px solid var(--py-border);\n        box-sizing: border-box;\n\n        \/* --- LAYOUT FIXES --- *\/\n        display: flex; 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resize: none; padding: 8px; font-family: monospace; width: 100%; }\n    \n    \/* MODIFIED: Adjusted line-height for better pattern alignment *\/\n    .py-receipt-output-display { \n        flex: 1; background: white; border: 1px solid var(--py-border); \n        border-radius: 4px; padding: 8px; font-family: monospace; \n        white-space: pre-wrap; overflow-y: auto; font-size: 13px; \n        line-height: 1.15; \/* Fix for gap between stars *\/\n    }\n\n    \/* --- FOOTER ACTIONS --- *\/\n    .py-receipt-footer-actions {\n        height: var(--py-footer-height);\n        border-top: 1px solid var(--py-border);\n        display: flex;\n        align-items: center;\n        justify-content: flex-end; \n        padding: 0 20px;\n        background-color: var(--py-bg-panel);\n    }\n\n    .py-receipt-execution-group { display: flex; gap: 12px; align-items: center; }\n\n    .py-receipt-btn {\n        padding: 8px 20px;\n        border-radius: 4px;\n        font-size: 14px;\n        font-weight: 600;\n        cursor: pointer;\n        text-decoration: none;\n        display: inline-flex;\n        align-items: center;\n        justify-content: center;\n        transition: 0.2s;\n        height: 38px;\n        box-shadow: none;\n        border: none;\n    }\n\n    .py-receipt-btn-secondary { background: transparent; 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}\n        .py-receipt-ide-container { flex-direction: column; overflow-y: auto; height: auto; }\n        .py-receipt-left-pane, .py-receipt-right-pane { width: 100%; height: auto; }\n        \n        .py-receipt-left-pane { \n            border-right: none; \n            border-bottom: 8px solid #f3f4f6; \n            min-height: auto;\n            max-height: 400px;\n        }\n        \n        .py-receipt-right-pane { display: flex; flex-direction: column; }\n        \n        .py-receipt-console-section, \n        .py-receipt-console-body,\n        .py-receipt-footer-actions { display: contents; }\n        \n        .py-receipt-console-header { display: none; }\n        .py-receipt-editor-top-bar { order: 1; }\n        \n        .py-receipt-code-area { \n            order: 2; height: 500px; flex: none; \n        } \n        .py-receipt-code-area .CodeMirror { position: relative; height: 500px; }\n\n        .py-receipt-input-wrapper { \n            order: 3; width: 100%; height: auto; min-height: 280px; \n            border-right: none; border-top: 8px solid #f3f4f6; border-bottom: 1px solid var(--py-border);\n        }\n\n        .py-receipt-execution-group {\n            order: 4; width: 100%; display: flex; padding: 15px; gap: 10px;\n            border-bottom: 1px solid var(--py-border); background: #fff;\n        }\n        .py-receipt-execution-group .py-receipt-btn { flex: 1; }\n        \n        .py-receipt-output-wrapper {\n            order: 5; width: 100%; height: auto; min-height: 300px; max-height: 500px;\n            border-right: none; background: #fff;\n        }\n\n        .py-receipt-btn-mobile {\n            display: inline-flex !important; order: 6; width: 48%; margin: 15px 1%;\n            box-sizing: border-box; text-align: center;\n        }\n        \n        a.py-receipt-hidden { display: none !important; }\n    }\n<\/style>\n\n<div class=\"py-receipt-wrapper\">\n    <div class=\"py-receipt-top-nav\">\n        <a id=\"py-star-btn-prev-top\" class=\"py-receipt-btn py-receipt-btn-secondary py-receipt-hidden\" href=\"#\">&larr; Previous<\/a>\n        <span class=\"py-receipt-nav-title\">Module 3: Nested Loops<\/span>\n        <a id=\"py-star-btn-next-top\" class=\"py-receipt-btn py-receipt-btn-primary py-receipt-hidden\" href=\"#\">Next &rarr;<\/a>\n    <\/div>\n\n    <div class=\"py-receipt-ide-container\" id=\"py-star-ideContainer\">\n        \n        <div class=\"py-receipt-left-pane\">\n            <div class=\"py-receipt-tabs-header\">\n                <div class=\"py-receipt-tab-item active\" onclick=\"pyStarSwitchTab('statement')\">Statement<\/div>\n                <div class=\"py-receipt-tab-item\" onclick=\"pyStarSwitchTab('solution')\">Solution<\/div>\n            <\/div>\n\n            <div id=\"py-star-tab-statement\" class=\"py-receipt-pane-content active\">\n                <h1 id=\"exercise-3-4-pattern-printing\">Exercise 3.4: Pattern Printing<\/h1>\n                <p>Use <strong>Nested Loops<\/strong> (a loop inside another loop) to print a right-angled triangle of stars.<\/p>\n                \n                <p>Your program should:<\/p>\n                <ul>\n                    <li>Take the number of rows as input (use <code>5<\/code> for the standard pattern).<\/li>\n                    <li>Use an <strong>Outer Loop<\/strong> to handle the rows (1 to N).<\/li>\n                    <li>Use an <strong>Inner Loop<\/strong> to handle the columns. The number of stars should equal the current row number.<\/li>\n                    <li>Print <code>*<\/code> without moving to a new line inside the inner loop.<\/li>\n                    <li>Print a new line after the inner loop finishes.<\/li>\n                <\/ul>\n\n                <h3 id=\"sample-interaction\">Sample Interaction:<\/h3>\n                <div class=\"py-receipt-sample-box\">\n                    <div class=\"py-receipt-sample-header\">\n                        <div class=\"py-receipt-sample-col-title\">Input<\/div>\n                        <div class=\"py-receipt-sample-col-title\">Output<\/div>\n                    <\/div>\n                    <div class=\"py-receipt-sample-body\">\n                        <div class=\"py-receipt-sample-col-content\">5<\/div>\n                        <div class=\"py-receipt-sample-col-content\">Enter rows: 5\n*\n**\n***\n****\n*****<\/div>\n                    <\/div>\n                <\/div>\n            <\/div>\n\n            <div id=\"py-star-tab-solution\" class=\"py-receipt-pane-content\">\n                <h1 id=\"solution\">Solution<\/h1>\n                <p>To keep the cursor on the same line while printing, use <code>end=\"\"<\/code> inside the print function.<\/p>\n                <div class=\"py-receipt-solution-block\"># 1. Get User Input\nrows = int(input(\"Enter rows: \"))\nprint() # Important: Force new line after input\n\n# 2. Outer loop for rows (1 to rows)\nfor i in range(1, rows + 1):\n    \n    # 3. Inner loop for columns (1 to current row number)\n    for j in range(i):\n        print(\"*\", end=\"\")\n        \n    # 4. Move to new line after inner loop\n    print()<\/div>\n                \n                <p style=\"margin-top:20px\"><strong>Key Concepts:<\/strong><\/p>\n                <ul>\n                    <li><code>range(1, rows + 1)<\/code> ensures we get exactly N rows.<\/li>\n                    <li><code>print(\"*\", end=\"\")<\/code> suppresses the default newline character, allowing stars to appear side-by-side.<\/li>\n                    <li>The empty <code>print()<\/code> handles the line break after each row is finished.<\/li>\n                <\/ul>\n            <\/div>\n        <\/div>\n\n        <div class=\"py-receipt-right-pane\">\n            <div class=\"py-receipt-editor-top-bar\">\n                <span class=\"py-receipt-lang-label\">Python 3<\/span>\n                <div class=\"py-receipt-editor-settings\">\n                    <i class=\"fas fa-expand\" id=\"py-star-fullscreenBtn\" title=\"Toggle Fullscreen\"><\/i>\n                <\/div>\n            <\/div>\n\n            <div class=\"py-receipt-code-area\">\n                <div id=\"py-star-code-editor-div\"><\/div>\n            <\/div>\n\n            <div class=\"py-receipt-console-section\">\n                <div class=\"py-receipt-console-header\">Test Console<\/div>\n                <div class=\"py-receipt-console-body\">\n                    <div class=\"py-receipt-input-wrapper\">\n                        <label class=\"py-receipt-console-label\">Custom Input (Stdin)<\/label>\n                        <textarea id=\"py-star-custom-input\" class=\"py-receipt-custom-input-area\" placeholder=\"Enter number of rows...\">5<\/textarea>\n                    <\/div>\n                    <div class=\"py-receipt-output-wrapper\">\n                        <label class=\"py-receipt-console-label\">Output<\/label>\n                        <div id=\"py-star-output-console\" class=\"py-receipt-output-display\">Run code to see output...<\/div>\n                    <\/div>\n                <\/div>\n            <\/div>\n\n            <div class=\"py-receipt-footer-actions\">\n                <a id=\"py-star-btn-prev-mobile\" class=\"py-receipt-btn py-receipt-btn-secondary py-receipt-hidden py-receipt-btn-mobile\" href=\"#\">&larr; Previous<\/a>\n\n                <div class=\"py-receipt-execution-group\">\n                    <button class=\"py-receipt-btn py-receipt-btn-secondary\" onclick=\"pyStarResetCode()\">Reset<\/button>\n                    \n                    <button class=\"py-receipt-btn py-receipt-btn-primary\" onclick=\"pyStarRunCode()\">\n                        <span id=\"py-star-btn-text\">Run Code<\/span>\n                        <span class=\"py-receipt-spinner\" id=\"py-star-btn-spinner\"><\/span>\n                    <\/button>\n                <\/div>\n\n                <a id=\"py-star-btn-next-mobile\" class=\"py-receipt-btn py-receipt-btn-primary py-receipt-hidden py-receipt-btn-mobile\" href=\"#\">Next &rarr;<\/a>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<script src=\"https:\/\/cdnjs.cloudflare.com\/ajax\/libs\/codemirror\/5.65.16\/codemirror.min.js\"><\/script>\n<script src=\"https:\/\/cdnjs.cloudflare.com\/ajax\/libs\/codemirror\/5.65.16\/mode\/python\/python.min.js\"><\/script>\n<script src=\"https:\/\/cdnjs.cloudflare.com\/ajax\/libs\/codemirror\/5.65.16\/addon\/edit\/closebrackets.min.js\"><\/script>\n\n<script>\n    \/\/ --- EXERCISE 3.4: PATTERN PRINTING LOGIC ---\n    var pyStarEditor; \n    var pyStarStarterCode;\n\n    \/\/ --- 1. 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Your program should: Take the number of rows as input (use 5 for the standard pattern). 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