How do I use the substring method in JavaScript?

How do I use the substring method in JavaScript?

The substring method in JavaScript extracts characters from a string between two specified indices. You can use it like this: str.substring(startIndex, endIndex);.

Can you give me an example of how it works?

Sure! If you have a string like let str = 'Hello, World!'; and you call str.substring(0, 5);, it will return 'Hello'.

What happens if I provide only one index?

If you provide only one index, like str.substring(7);, it will return the substring from that index to the end of the string, so it would return 'World!'.

Are there any differences between substring and substr?

Yes, substring takes two indices, while substr takes a starting index and a length. For example, str.substr(0, 5); also returns 'Hello'.