What is the primary purpose of the DOCTYPE declaration in HTML?

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Multiple Choice

What is the primary purpose of the DOCTYPE declaration in HTML?

Explanation:
The DOCTYPE declaration mainly tells the browser what version of HTML to expect and, crucially, which rendering mode to use. By specifying a proper doctype, the browser renders the page in standards mode, applying modern HTML and CSS rules consistently. In HTML5, the simple declaration <!DOCTYPE html> activates this standards mode across browsers. It’s not about character encoding (that uses a separate meta tag or HTTP header), nor about setting a base URL or loading stylesheets (those involve other tags like <meta charset>, <base>, and <link rel="stylesheet">).

The DOCTYPE declaration mainly tells the browser what version of HTML to expect and, crucially, which rendering mode to use. By specifying a proper doctype, the browser renders the page in standards mode, applying modern HTML and CSS rules consistently. In HTML5, the simple declaration activates this standards mode across browsers. It’s not about character encoding (that uses a separate meta tag or HTTP header), nor about setting a base URL or loading stylesheets (those involve other tags like , , and ).

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