The javascript string is an object that represents a sequence of characters. We are going to learn how can we repeat a string using JavaScript.

Below are the methods to repeat a string in JavaScript:

Using the repeat() method

This method is used to create a new string by repeating an existing string a specified number of times using the repeat() method. If a user provides the count to be 0 or negative, then an empty string is returned.

Syntax:

str.repeat(count);

// Here str is your string
// And count is how many times you want to repeat the string

Example: This example shows the implementation of the above-explained approach.

const str = "Gfg ";
const repeatedStr = str.repeat(3);
console.log(repeatedStr);

Gfg Gfg Gfg 

Using for Loop

At first define a function "repeatString" and inside a funcrtion define a for loop which repeats a given string a specified number of times.

Syntax:

  for (i = 0; i < Number_of_time ; i++) {
    ans += Your_String;
  }

Example: Below example shows the implementation of the above-explained approach.

function repeatString(str, count) {
    let result = '';
    for (let i = 0; i < count; i++) {
        result += str;
    }
    return result;
}

console.log(repeatString('hello gfg ', 3));

hello gfg hello gfg hello gfg 

Using the Array constructor and join() method

First define a string which you want to repeat. Then use the Array constructor to create an array with a specified length, where each element will represent a repetition of the original string. After that use the fill() method to fill each element in the array with the original string. Then use the join() method to concatenate all the elements of the array into a single string. At last display the string.

Example: This example shows the implementation of the above-explained approach.

const str = "javascript ";
const repeatedStr = new Array(3).fill(str).join('');
console.log(repeatedStr); 

javascript javascript javascript 

Using Recursion

In this approach, we use recursion to repeat a string a specified number of times. The function calls itself with a decremented count until the base case is reached, at which point it returns the concatenated string.

Example: This example shows the implementation of repeating a string using recursion.

function repeatString(str, count) {
  if (count <= 0) {
    return '';
  }
  if (count === 1) {
    return str;
  }
  return str + repeatString(str, count - 1);
}

// Example usage
const originalString = "hello ";
const times = 3;
const result = repeatString(originalString, times);
console.log(result); // Output: "hello hello hello "

hello hello hello 

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Article Tags :

• JavaScript
• Web Technologies
• JavaScript-Questions