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. 