JavaScript repeat(): Repeat String n Times

The JavaScript repeat() method is used when we need to repeat a string for n number of times. For example:

HTML with JavaScript Code

<!DOCTYPE html>
<html>
<body>

   <p id="xyz"></p>

   <script>
      let myString = "codescracker.com";
      
      let res = myString.repeat(3);
      document.getElementById("xyz").innerHTML = res;
   </script>
   
</body>
</html>

Output

The code in the preceding example creates a string variable named myString and assigns the value "codescracker.com" to it.

let myString = "codescracker.com";

The repeat() function is called on the myString variable with an argument of 3. The repeat() function returns a new string consisting of the original string repeated a specified number of times.

let res = myString.repeat(3);

In this case, the new string returned by the repeat() function will contain three copies of the original string "codescracker.com" concatenated together.

The resulting string is assigned to a new variable named res.

Finally, the innerHTML property of an HTML element with ID "xyz" is set to the value of the res variable.

document.getElementById("xyz").innerHTML = res;

As a result, when the code is executed, the string "codescracker.comcodescracker.comcodescracker.com" will be displayed inside the "p" tag with ID "xyz."

JavaScript repeat() Syntax

The syntax of the repeat() method in JavaScript is:

string.repeat(n)

The n argument is required and refers to a number that is used to create a number of copies of the specified string.

Advantages of the repeat() function in JavaScript

The repeat() function allows you to repeat a string a specified number of times without using complex loops or string concatenation.
When compared to traditional string concatenation techniques, the repeat() function is highly optimized for performance.
Because it clearly conveys your intent to repeat a string, using the repeat() function can make your code more readable.

Disadvantages of the repeat() function in JavaScript

The repeat() function is a recent addition to the JavaScript language and may be incompatible with older browsers.
Using the repeat() function to repeat a string a large number of times can result in large strings that consume a lot of memory.
The repeat() function is only useful in a few situations, such as creating repeated patterns or padding strings. Other functions, such as split(), join(), or regular expressions, may be more appropriate for more complex string manipulation tasks.

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