How do I concatenate strings in JavaScript?

How do I concatenate strings in JavaScript?

You can concatenate strings in JavaScript using the + operator or the concat() method. For example: let str1 = 'Hello'; let str2 = 'World'; let result = str1 + ' ' + str2; This will give you 'Hello World'.

Is there a way to concatenate multiple strings at once?

Yes, you can use the join() method of an array to concatenate multiple strings. For example: let strings = ['Hello', 'World', 'from', 'JavaScript']; let result = strings.join(' '); This will give you 'Hello World from JavaScript'.

What about using template literals?

Template literals are a great way to concatenate strings! You can use backticks and ${} to embed expressions. For example: let result = `${str1} ${str2}`; will also give you 'Hello World'.

Are there performance differences between these methods?

In general, for a small number of strings, the performance difference is negligible. However, for a large number of strings, using join() is often more efficient than using + in a loop.