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How to find the length of a string in JavaScript?

Every string in JavaScript has a length property that returns the length of a string.

The syntax for using the length property is shown below:

let stringLength = string.length;

The following example will show you how to use find the length of a string:

let str = "JavaScript String";
let stringLength = str.length;

console.log(`The length of a string is ${stringLength}.`); //The length of a string is 17.

If you don't want to use the length property, you can use the for...in loop to determine the length of a string.

let str = "JavaScript String";
let stringLength = 0;

for(let character in str){
  stringLength++;
}

console.log(`The length of a string is ${stringLength}.`); //The length of a string is 17.