How javascript calculates a string how many characters are there

This article is about how javascript calculates how many characters a string has. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

JS count the number of characters: 1, the use of string length attribute, syntax "str.length"; 2, the use of "for...of" or "for...in" statements to loop through the array, statistics traversal times, syntax "for (var ch of str) {Count++;}".

The operating environment of this tutorial: windows7 system, javascript1.8.5 version, Dell G3 computer.

Method 1: use the length attribute of the string

In JavaScript, the length of a string can be read using the length property of the string. The length is in characters, and the attribute is read-only.

Var str = "String type length"; / / defines the string console.log (str.length); / / returns 11 characters

Output result:

Method 2: use for...of or for...in statements to loop through the array, and count the traversal times.

Var str = "String type length!"; / / definition string var charCount = 0 for (var ch of str) {charCount++;} / / for (var ch in str) {/ / charCount++;//} console.log (charCount); / / output: 12 Thank you for reading! This is the end of the article on "how javascript calculates how many characters a string has". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, you can share it for more people to see!