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This article mainly explains "what are the characteristics of strings in js". The explanation in this article is simple and clear, easy to learn and understand. Please follow the ideas of Xiaobian to study and learn "what are the characteristics of strings in js" together.

All methods of the string do not modify the string itself (the string is immutable), and a new string will be returned after the operation is completed.

Because strings are immutable, there are efficiency problems when concatenating a large number of strings.

Each concatenation takes up a memory, adding a new string, and loading is slower.

examples

var sum = "";for (var i = 1 ; i

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