JavaScript: Find the position of a rightmost round number in an array of integers. Returns 0 if there are no round number
JavaScript Basic: Exercise-139 with Solution
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.
Note: A round number is informally considered to be an integer that ends with one or more zeros.
Pictorial Presentation:
Sample Solution:
HTML Code:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>Find the position of a rightmost round number in an array of integers. Returns 0 if there are no round number</title>
</head>
<body>
</body>
</html>
JavaScript Code:
function find_rightmost_round_number(input_arr) {
var result = 0;
for (var i = 0; i < input_arr.length; i++)
{
if (input_arr[i] % 10 === 0) {
result = i;
}
}
return result;
}
console.log(find_rightmost_round_number([1, 22, 30, 54, 56]));
console.log(find_rightmost_round_number([1, 22, 32, 54, 56]));
console.log(find_rightmost_round_number([1, 22, 32, 54, 50]));
Sample Output:
2 0 4
Flowchart:
ES6 Version:
function find_rightmost_round_number(input_arr) {
let result = 0;
for (let i = 0; i < input_arr.length; i++)
{
if (input_arr[i] % 10 === 0) {
result = i;
}
}
return result;
}
console.log(find_rightmost_round_number([1, 22, 30, 54, 56]));
console.log(find_rightmost_round_number([1, 22, 32, 54, 56]));
console.log(find_rightmost_round_number([1, 22, 32, 54, 50]));
Live Demo:
See the Pen javascript-basic-exercise-139 by w3resource (@w3resource) on CodePen.
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Previous: Write a JavaScript program to reverse the bits of a given 16 bits unsigned short integer.
Next: Write a JavaScript program to check if all the digits in a given number are the same or not.
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JavaScript: Tips of the Day
How to insert an item into an array at a specific index (JavaScript)?
What you want is the splice function on the native array object.
arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it's just an insert). In this example we will create an array and add an element to it into index 2:
var arr = []; arr[0] = "Jani"; arr[1] = "Hege"; arr[2] = "Stale"; arr[3] = "Kai Jim"; arr[4] = "Borge"; console.log(arr.join()); arr.splice(2, 0, "Lene"); console.log(arr.join());
Ref: https://bit.ly/2BXbp04
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