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JavaScript: Create a new string of specified copies of a given string

JavaScript Basic: Exercise-57 with Solution

Write a JavaScript program to create one string of specified copies (positive numbers) of a given string.

Pictorial Presentation:

JavaScript: Create a new string of specified copies of a given string

Sample Solution:

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JavaScript program to create a new string of specified copies of a given string.</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function string_copies (str, n) 
{
  if (n < 0)
    return false;
  else
  return str.repeat(n);
}
console.log(string_copies("abc", 5));
console.log(string_copies("abc", 0));
console.log(string_copies("abc", -2));

Sample Output:

abcabcabcabcabc

false

Flowchart:

Flowchart: JavaScript - Create a new string of specified copies of a given string

ES6 Version:

function string_copies (str, n) 
{
  if (n < 0)
    return false;
  else
  return str.repeat(n);
}
console.log(string_copies("abc", 5));
console.log(string_copies("abc", 0));
console.log(string_copies("abc", -2));

Live Demo:

See the Pen JavaScript - create a new string of specified copies (positive number) of a given string. - basic-ex-57 by w3resource (@w3resource) on CodePen.


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Previous: Write a JavaScript program to divide two positive numbers and return a string with properly formatted commas.
Next: Write a JavaScript program to create a new string of 4 copies of the last 3 characters of a given original string.

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JavaScript: Tips of the Day

Calculates the greatest common divisor between two or more numbers/arrays

Example:

const tips_gcd = (...arr) => {
  const gcd = (x, y) => (!y ? x : tips_gcd(y, x % y));
  return [...arr].reduce((p, q) => gcd(p, q));
};
console.log(tips_gcd(5, 25));
console.log(tips_gcd(...[8, 16, 32]));

Output:

5
8

 

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