{"id":6911,"date":"2024-03-14T04:49:19","date_gmt":"2024-03-14T04:49:19","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-write-a-calculator-in-elixir\/"},"modified":"2025-08-02T09:43:46","modified_gmt":"2025-08-02T09:43:46","slug":"how-to-write-a-calculator-in-elixir","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-write-a-calculator-in-elixir\/","title":{"rendered":"How to Build a Calculator in Elixir"},"content":{"rendered":"<p>In ecilisp, you can create a calculator by defining functions. Here is a simple example:<\/p>\n<pre class=\"post-pre\"><code>(<span class=\"hljs-name\">define<\/span> (<span class=\"hljs-name\">calculator<\/span>)\r\n  (<span class=\"hljs-name\">display<\/span> <span class=\"hljs-string\">\"Enter an expression (+, -, *, \/): \"<\/span>)\r\n  (<span class=\"hljs-name\">let<\/span> ((<span class=\"hljs-name\">expression<\/span> (<span class=\"hljs-name\">read<\/span>)))\r\n    (<span class=\"hljs-name\">let<\/span> ((<span class=\"hljs-name\">result<\/span> (<span class=\"hljs-name\">case<\/span> expression\r\n                    ((<span class=\"hljs-name\">+<\/span>) (<span class=\"hljs-name\">+<\/span> (<span class=\"hljs-name\">read<\/span>) (<span class=\"hljs-name\">read<\/span>)))\r\n                    ((<span class=\"hljs-name\">-<\/span>) (<span class=\"hljs-name\">-<\/span> (<span class=\"hljs-name\">read<\/span>) (<span class=\"hljs-name\">read<\/span>)))\r\n                    ((<span class=\"hljs-name\">*<\/span>)\r\n                     (<span class=\"hljs-name\">*<\/span> (<span class=\"hljs-name\">read<\/span>) (<span class=\"hljs-name\">read<\/span>)))\r\n                    ((<span class=\"hljs-name\">\/<\/span>)\r\n                     (<span class=\"hljs-name\">\/<\/span> (<span class=\"hljs-name\">read<\/span>) (<span class=\"hljs-name\">read<\/span>)))))\r\n      (<span class=\"hljs-name\">display<\/span> <span class=\"hljs-string\">\"Result: \"<\/span>)\r\n      (<span class=\"hljs-name\">display<\/span> result))))\r\n<\/code><\/pre>\n<p>Next, you can call this function in the ecilisp REPL to use the calculator.<\/p>\n<pre class=\"post-pre\"><code>(<span class=\"hljs-name\">calculator<\/span>)\r\n<\/code><\/pre>\n<p>Next, enter the expression based on the prompt (e.g. +, -, *, \/), then input two numbers, and the calculator will calculate and display the result.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In ecilisp, you can create a calculator by defining functions. Here is a simple example: (define (calculator) (display &#8220;Enter an expression (+, -, *, \/): &#8220;) (let ((expression (read))) (let ((result (case expression ((+) (+ (read) (read))) ((-) (- (read) (read))) ((*) (* (read) (read))) ((\/) (\/ (read) (read))))) (display &#8220;Result: &#8220;) (display result)))) Next, [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[8688,8687,8686,422,799],"class_list":["post-6911","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-beginner-guide","tag-calculator","tag-elixir","tag-functional-programming","tag-programming-tutorial"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to Build a Calculator in Elixir - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn how to build a calculator in Elixir with our step-by-step tutorial. 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