How do you reverse digits in integers?

How do you reverse digits in integers?

How to reverse a number mathematically.

1. Step 1 — Isolate the last digit in number. lastDigit = number % 10. The modulo operator (%) returns the remainder of a divison.
2. Step 2 — Append lastDigit to reverse. reverse = (reverse * 10) + lastDigit.
3. Step 3-Remove last digit from number. number = number / 10.

How do you reverse a signed integer in Java?

Reverse a number using while loop

1. public class ReverseNumberExample1.
2. {
3. public static void main(String[] args)
4. {
5. int number = 987654, reverse = 0;
6. while(number != 0)
7. {
8. int remainder = number % 10;

How do you reverse a number in Scala?

Use var nums = List(4,7,2,3) to create the list. 2) To reverse this list type ‘nums. reverse and choose reverese: List{Int}’ from the auto-fill. Hit Run, you’ll get the output as 3,2,4,7 as you can see in the picture below.

How do you reverse an array in Scala?

Scala Code Editor :

1. object Scala_Array {
2. def test(nums: Array[Int]): Array[Int] = {
3. var temp1 = 0.
4. var temp2 = 0.
5. var index_position = 0.
6. var index_last_pos = nums. length – 1.
7. while (index_position < index_last_pos) {
8. temp1 = nums(index_position)

When the digits of a two digit number are reversed?

Let the digits of the number we need to find be ab. So the number is 10*a + b. The digits are reversed when 27 is added to it. Therefore for all the numbers 14 , 25 , 36 , 47 , 58 and 69 the digits are reversed when 27 is added.

How to reverse the Order of digits of an integer?

Algorithm to reverse order of digits of an integer. In this guide, we going to learn a programming algorithm to reverse the order of digits of an integer. Here explains the algorithm to Reverse the order of digits of a positive integer. We can access each digit. and start the access from rightmost (least significant digit).

How to reverse digits of an integer with overflow?

Write a program to reverse an integer assuming that the input is a 32-bit integer. If the reversed integer overflows, print -1 as the output. Let us see a simple approach to reverse digits of an integer . However, if the number is large such that the reverse overflows, the output is some garbage value.

How to write program to reverse digits of a number?

Write a program to reverse the digits of an integer. Time Complexity: O (log (n)), where n is the input number. Time Complexity: O (log (n)) where n is the input number. So for the above input if we try to solve this by reversing the string, then the output will be 00123.

How to reverse an integer in C + +?

Example: C++ Program to Reverse an Integer. #include using namespace std; int main() { int n, reversedNumber = 0, remainder; cout << “Enter an integer: “; cin >> n; while(n != 0) { remainder = n%10; reversedNumber = reversedNumber*10 + remainder; n /= 10; } cout << “Reversed Number = ” << reversedNumber; return 0; }