# JavaScript: Check an integer is Repdigit number or not

## JavaScript Math: Exercise-80 with Solution

Write a JavaScript program to check whether a given integer is a Repdigit or not.

From Wikipedia -
In recreational mathematics, a repdigit or sometimes monodigit is a natural number composed of repeated instances of the same digit in a positional number system (often implicitly decimal). The word is a portmanteau of repeated and digit. Examples are 11, 666, 4444, and 999999.

Test Data:
(11) -> true
(66) -> true
(336) -> false
(444) -> true
(1151) -> false

Sample Solution:

JavaScript Code:

``````/**
* Function to check if a number is a Repdigit.
* @param {number} n - The input number.
* @returns {boolean} - True if the number is a Repdigit, otherwise false.
*/
function test(n) {
// Convert the number to a string and create a set to count unique digits
return new Set('' + n).size === 1;
}

// Test cases
// Assign value to n
n = 11;
// Print the value of n
console.log("n = " + n);
// Check if the said number is Repdigit
console.log("Check the said number is Repdigit: " + test(n));
// Repeat the above steps for different values of n
n = 66;
console.log("n = " + n);
console.log("Check the said number is Repdigit: " + test(n));
n = 336;
console.log("n = " + n);
console.log("Check the said number is Repdigit: " + test(n));
n = 444;
console.log("n = " + n);
console.log("Check the said number is Repdigit: " + test(n));
n = 1151;
console.log("n = " + n);
console.log("Check the said number is Repdigit: " + test(n));
```
```

Output:

```n = 11
Check the said number is Repdigit: true
n = 66
Check the said number is Repdigit: true
n = 336
Check the said number is Repdigit: false
n = 444
Check the said number is Repdigit: true
n = 1151
Check the said number is Repdigit: false
```

Flowchart:

Live Demo:

See the Pen javascript-math-exercise-80 by w3resource (@w3resource) on CodePen.

Improve this sample solution and post your code through Disqus.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.

﻿