second last digit of a number in java

asked Oct 5 '13 at 5:13. You can apply this logic until you processed the last digit. Suppose if n = 1234 then last Digit = n % 10 => 4 To finding first digit of a number is little expensive than last digit. To run above program smoothly, please provide the integer number. Output - Yes . If we do x % 10 for a number x, it will return the last digit of that number. 6 >= 10 then Condition False. A Simple Solution is to first find n!, then find last non-zero digit of n. This solution doesn’t work for even slightly large numbers due to arithmetic overflow. Please note if you want the user to supply the number, you need to check for its validity. Find the total number of digits in the given number. How do you find the second digit of a number? The second operation doesn't need to get the remainder and the quotient each time. Second last digit of the number will simply be: Last digit of (Second last digit of base) X (Last digit of power) Let us look at few examples Input - 24 . Let's say, for common security measures, you want to display only the last four digits of an identification or Social Security number, credit card number, or other number and replace the rest of the digits with asterisks. share | improve this question | follow | edited Oct 5 '13 at 6:29. For displaying the value in an absolute manner, we will be using the method Math.abs. Find the first digit of the number. Logic to find last digit of a number. Sample. Get the number and the nth digit to be deleted. Write a program in Java to find out the second smallest digit of a given number without using arrays. Get a number num (using input() method) Seprate the last digit of number num by "digit = num%10". click to know how to solve program like these. Let's see another example to get second largest element or number in java array using collections. Solve question related to Java - Operators. Declare sum variable and initialize it with 0. Using cout and cin, we are reading one value from the user.The program will ask the user to enter a number, it will read it and store it in the variable number.. The first task is to do is get the last digit, also the second last digit along with it. Algorithm to find first and last digits of a number. any positive number for example 678942. then n % 10 so 678942 % 10 = 2. the mod operator return last digit of number. In order to tell if a digit is the second greatest, you need to track the greatest at the same time. But the introduction of Bitwise or has made the task very easy. D1 >= 10 or 678942 >= 10 while condition true then n/10 678942 / 10 then value returns 67894, 6789,678, 67,6. I need to define the last digit of a number assign this to value. Second last digit of the number will simply be: Last digit of (Second last digit of base) X (Last digit of power) Let us look at few examples. Next, this Java program returns the First and Last Digit of the user entered value. Before I explain logic to find first digit, let us first learn to find last digit of a number.. To find last digit of a number in programming we use modulo operator %.A number when modulo divided by 10 returns its last digit. Here is a simple Java program to find the first and the last digit of a given number. If the last digit of the result is 0, the number is valid. Tony J. asked Oct 7 '15 at 18:03. You can do it by dividing by ten and then taking the remainder of division by ten: int second = (number / 10) % 10; In general, you could think of integer-dividing by a k -th power of ten as of dropping k least significant digits. The expression number%10 gives the last digit of the number. On you sheet of paper, do 2 columns for greatest and second, then try to find how things evolve as digits are coming. All the last digits are then compared using if..else statement and logical AND operator && operator. The Last Digit of a Large Fibonacci Number — aadimator Explanation: Well there’s not much to say, as it is not a very tricky problem. For example, if you divide 123 by 10, and take the remainder, you'd get the first digit 3.If you do integer division of 123 by 100 and then divide the result by 10, you'd get the second digit 2.More generally, the n-th digit of a number can be obtained by the formula (number / base^(n-1)) % base: Java Programming Code to Add Digits of Number. For a number n given, we need to find whether all digits of n divide it or not i.e. Suppose if n = 1234. then last Digit = n % 10 => 4. In this tutorial, as discussed we will be solving the problem on Java program to find the second last digit of a number. The sample output for the above program is as below: How to count the number of digits in a given string in Java, Optimization Techniques : Adaptive Gradient Descent, Program to convert pounds (lbs) to Kilograms (kg) in Java, ExpressJS Web Application Framework | Node.Js, Determine Whether A Given Undirected Graph is Two-Colorable in Python, How to replace all ‘0’ with ‘5’ in an input Integer in Python, Convert Decimal fraction to binary in Python, Write to an excel file using openpyxl module in Python, Print Pattern – Codechef December Lunchtime 2018 Problem in Java, Total Ways to traverse a n*m board using Dynamic Programming in Java. For the above task, we will be taking the remainder of the above number and dividing it by 100. The three integer values are stored in variables a, b and c. To find the last digit we can use % operator. When Bitwise or is used there is no necessity of type-conversion and … When modulo divided by 10 returns its last digit. To add digits of any number in Java Programming, you have to ask to the user to enter the number to add their digits and display the summation of digits of that number. D1=6 so Last digit equal to 6. Many mathematical contests ask students to find the last digit (or digits) of a power. The value of n should be a second argument. There can be several ways to get second last digit; here we are discussing some solutions. What Java expression produces the second-to-last digit of the number (the 10s place)? Youngster Point Empowering and Enlightening youth with 10 Point analysis, Inspiring Personalities, Editorials, C & Java Programs, Data Structures and Algorithms and IQ Test. ; ” code if x is divided by 10 if n = 1234. then last digit along with.. Find the second last digit % 10 gives the last digit of number... Gold badges 50 50 silver badges 82 82 bronze badges x is divided by 10 returns the if... And dividing it by 100 for displaying the value in an integer number and nth... 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