let greeting = 'Hello'; greeting += ', World'; console.log(greeting); // Output: "Hello, World"
If you need to build up a string from multiple parts and you are concerned about performance, you can use an array and the join method to create the final string. For example:
const parts = ['Hello', ', ', 'World']; const greeting = parts.join(''); console.log(greeting); // Output: "Hello, World"
This can be faster than using string concatenation, especially if you have a large number of string parts. However, it is generally not necessary to worry about this unless you are dealing with very large strings or you are working on a performance-critical application.
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