JavaScript: Check whether all the digits in a given number are the same or not
JavaScript Basic: Exercise-140 with Solution
Write a JavaScript program to check whether all the digits in a given number are the same or not.
Pictorial Presentation:

Sample Solution:
HTML Code:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>Check whether all the digits in a given number are the same or not</title>
</head>
<body>
</body>
</html>
JavaScript Code:
function test_same_digit(num) {
var first = num % 10;
while (num) {
if (num % 10 !== first) return false;
num = Math.floor(num / 10);
}
return true
}
console.log(test_same_digit(1234));
console.log(test_same_digit(1111));
console.log(test_same_digit(22222222));
Sample Output:
false true true
Flowchart:

ES6 Version:
function test_same_digit(num) {
const first = num % 10;
while (num) {
if (num % 10 !== first) return false;
num = Math.floor(num / 10);
}
return true
}
console.log(test_same_digit(1234));
console.log(test_same_digit(1111));
console.log(test_same_digit(22222222));
Live Demo:
See the Pen javascript-basic-exercise-140 by w3resource (@w3resource) on CodePen.
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Previous:Write a JavaScript program to find the position of a rightmost round number in an array of integers. Returns 0 if there are no round number.
Next: Write a JavaScript program to find the number of elements which presents in both of the given arrays.
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JavaScript: Tips of the Day
Returns the sum of the powers of all the numbers from start to end (both inclusive)
Example:
const sumPower = (end, power = 2, start = 1) => Array(end + 1 - start) .fill(0) .map((x, i) => (i + start) ** power) .reduce((a, b) => a + b, 0); console.log(sumPower(10)); // 385 console.log(sumPower(10, 3)); // 3025 console.log(sumPower(10, 3, 5)); // 2925
Output:
385 3025 2925
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