{"version":"1.0","provider_name":"Blog - Silicon Cloud","provider_url":"https:\/\/www.silicloud.com\/blog","author_name":"Olivia Parker","author_url":"https:\/\/www.silicloud.com\/blog\/author\/oliviaparker\/","title":"How to use constant expressions in C++?","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"Cc2aSi6Ina\"><a href=\"https:\/\/www.silicloud.com\/blog\/how-to-use-constant-expressions-in-c\/\">How to use constant expressions in C++?<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/www.silicloud.com\/blog\/how-to-use-constant-expressions-in-c\/embed\/#?secret=Cc2aSi6Ina\" width=\"600\" height=\"338\" title=\"&#8220;How to use constant expressions in C++?&#8221; &#8212; Blog - Silicon Cloud\" data-secret=\"Cc2aSi6Ina\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n\/\/# sourceURL=https:\/\/www.silicloud.com\/blog\/wp-includes\/js\/wp-embed.min.js\n<\/script>\n","description":"In C++, a constant expression is an expression whose value can be determined at compile time. Using constant expressions can optimize the program at compile time and improve performance. They can be defined using the keyword constexpr. Here is an example: #include &lt;iostream&gt; constexpr int add(int a, int b) { return a + b; } [&hellip;]"}