Web Reference: When adding a number and a string, JavaScript will treat the number as a string. JavaScript evaluates expressions from left to right. Different sequences can produce different results: In the first example, JavaScript treats 16 and 4 as numbers, until it reaches "Volvo". Jan 19, 2026 · The Number data type in JavaScript includes both integers and floating-point numbers. Special values like Infinity, -Infinity, and NaN represent infinite values and computational errors, respectively. Data types represent the different kinds of values we can use in JavaScript. In this tutorial, you will learn about the various data types available in JavaScript with the help of examples.
YouTube Excerpt: This video is based on a section of the book A Practical Introduction to Modern
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Last Updated: April 12, 2026
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