How To Uncovering Largest Of 3 Integers Inward Coffee - Algorithm, Logic Example

One of the classical programme to create programming logic is, write a programme to discovery largest of 3 numbers. I am certain many of you lot guide maintain already done this practice inwards multifariousness of languages including C, C++, C#, JavaScript, Perl, Ruby, PHP etc. This fourth dimension nosotros volition produce it inwards Java. We volition root larn the logic yesteryear agreement flowchart of largest of 3 numbers together with and hence nosotros volition implement solution using ternary operator inwards Java. I honey this programme for its sheer simplicity together with how it tin forcefulness out assist beginners to create logic. As always, you lot are non allowed to usage whatever library business office which tin forcefulness out solve this employment directly, your brain trace of piece of work is to create logic using primitive linguistic communication tools e.g. operators. In Java, this employment is also used to learn how ternary operator works, equally 1 of the pop version of this require you lot to find largest of 3 numbers using ternary operator.

This employment is inwards similar category equally how to create upward one's heed if release is prime. This Java programme finds largest of 3 numbers together with and hence prints it. If the entered numbers are unequal together with hence 1 version of this programme returns Integer.MIN_VALUE, spell other provide the release itself.

By the way, the method used hither is non general, together with doesn't scale good for many numbers. For example, If you lot desire to find out largest of a listing of numbers country 10 integers together with hence using inwards a higher house approach is non easy, instead you lot tin forcefulness out usage array information structure, together with expire on rail of largest release spell comparing alongside other numbers.

We volition also encounter how nosotros tin forcefulness out usage ternary operator inwards Java to discovery biggest of 3 integers. I guide maintain made both method static, because they are genuinely utility method together with exclusively operates on their arguments, together with I tin forcefulness out telephone weep upward them from brain method directly, without creating object of this class.

Logic to discovery Greatest of Three Integers

Algorithm or logic is independent of programming language. More or less they are same inwards every language. For example, if you lot create logic without using library method e.g. exclusively based upon criterion operators together with information structures e.g. array, you lot tin forcefulness out usage them inwards dissimilar language.

For example, root logic tin forcefulness out hold upward used inwards JavaScript, C, C++ or C#. Second logic uses a especial operator, known equally ternary operator, equally it has 3 arguments, that's why it tin forcefulness out exclusively hold upward applied to languages which supports ternary operator e.g. Java. Logic to discovery biggest of 3 release is equally follows :

1. Check if root release is greater than instant together with third, if Yes, together with hence root release is largest.
2. Check if instant release is greater than instant together with third, if Yes, the instant release is largest.
3. Otherwise, tertiary release is largest.

This is the most elementary logic of finding maximum of 3 numbers, it can't hold upward simpler than this. By the way, in that place is around chance to improve my logic of finding biggest of three, equally you lot may notice, I am comparing same numbers to a greater extent than than 1 time. I leave of absence that equally practice for you, only volition give you lot around hint inwards the flowchart, which nosotros volition encounter inwards side yesteryear side section.

Largest of Three Numbers FlowChart

This is the flowchart of finding largest of 3 numbers inwards Java, it root reads 3 numbers A, B together with C from console, using utilities similar Scanner. Then it root compare Influenza A virus subtype H5N1 against B, if Influenza A virus subtype H5N1 > B together with hence it goes to compare Influenza A virus subtype H5N1 together with C. If Influenza A virus subtype H5N1 > C, the Influenza A virus subtype H5N1 is largest number, else C is maximum number. On the other hand, if Influenza A virus subtype H5N1 < B inwards root comparing together with hence instant comparing happens betwixt B together with C, if B > C together with hence B is largest otherwise C is largest number. This logic is shown inwards below flowchart, I am certain its much easier to sympathise a flowchart together with hence its description :)

Complexity of Our Solution

If you lot expect at the menstruum chart, you lot volition discovery that nosotros at-least needs to produce ii comparing to discovery maximum of 3 numbers. To sympathise this, you lot tin forcefulness out encounter how many diamond boxes nosotros are using inwards each path, in that place are exclusively two. So to discovery maximum of 3 numbers, nosotros guide maintain done 2 comparisons, which agency to discovery maximum of n numbers, nosotros postulate to produce n-1 comparison. That's why fourth dimension complexity of this solution is O(n).

Java Program to Find Largest of Three Numbers

Here is our consummate Java solution to this problem. As I said before, nosotros guide maintain ii solution, 1 which finds largest of 3 numbers using ternary operator together with other which uses if-else-if loop. First solution is rattling elementary equally it compares numbers to a greater extent than than required, inwards worst instance it does 8 comparisons. Second solution uses the logic from flowchart together with exclusively does ii comparing to discovery the largest of three. This instance is also user driven, we read input from user, together with and hence feed them into our method to discovery biggest of 3 numbers. You are gratis to improve the logic, only don't forget to explicate why it's better, this is where you lot score.

import java.util.Scanner;   /** * Java programme to discovery largest of 3 Integer numbers. You tin forcefulness out non usage whatever library method to  * solve this problem. You postulate to create logic yesteryear yourself.  * Input : 3, 5, seven * Output : seven * * @author Javin Paul */  public class LargestOfThree{      public static void main(String args[]) {          Scanner cmd = new Scanner(System.in);         System.out.println("Please move inwards 3 dissimilar numbers to discovery largest of them");         int root = cmd.nextInt();         int instant = cmd.nextInt();         int tertiary = cmd.nextInt();          int largest = largestOfThree(first, second, third);         System.out.printf("Largest of 3 numbers, betwixt %d, %d together with %d is %d %n",                 first, second, third, largest);          int greatest = greatestOfThreeUsingTernaryOperator(first, second, third);         System.out.printf("Greatest of 3 numbers inwards Java using ternary operator is %d %n", greatest);          //close the scanner to forbid resources leak         cmd.close();      }      /**      * Find largest of 3 numbers inwards Java. All 3 numbers must hold upward      * distinct.      *      * @param root      * @param instant      * @param tertiary      * @return largest of 3 numbers, or Integer.MIN_VALUE if numbers are non      * distinct.      */     public static int largestOfThree(int first, int second, int third) {         if (first > instant && root > third) {             return first;         } else if (second > root && instant > third) {             return second;         } else if (third > root && tertiary > second) {             return third;         }         return Integer.MIN_VALUE;     }      /**      * business office to discovery largest of 3 numbers inwards Java using ternary operator      * @param 1      * @param ii      * @param 3      * @return biggest of 3 numbers      */     public static int greatestOfThreeUsingTernaryOperator(int one, int two, int three) {         return (one > two) ? (one> 3 ? 1 : three) : (two > 3 ? ii : three);     }  }   Output: Please move inwards 3 dissimilar numbers to discovery largest of them 11 21 31 Largest of 3 numbers, betwixt 11, 21 together with 31 is 31  Greatest of 3 numbers inwards Java using ternary operator is 31    Please move inwards 3 dissimilar numbers to discovery largest of them 4 5 4 Largest of 3 numbers, betwixt 4, 5 together with 4 is 5  Greatest of 3 numbers inwards Java using ternary operator is 5   Please move inwards 3 dissimilar numbers to discovery largest of them 23 23 23 Largest of 3 numbers, betwixt 23, 23 together with 23 is -2147483648  Greatest of 3 numbers inwards Java using ternary operator is 23

If you lot expect at the concluding case, it seems this programme has around bugs, it doesn't provide right value if all 3 numbers are equal, at-least the root method. Can you lot alteration this programme to provide the release itself if all 3 integers are same? for instance inwards this instance it should provide 23. For your help, I guide maintain implemented that logic inwards the instant version of that function, which finds largest of 3 numbers using ternary operator.


That's all most how to discovery maximum of 3 numbers inwards Java. We guide maintain also learned most usage of ternary operator to solve this problem. If you lot are absolute beginner together with aspect upward employment to sympathise logic, I propose to accept a expect at the flowchart to discovery largest of 3 numbers. It's much easier to sympathise a flowchart than all description. It's said for null that, a moving-picture demo is worth to a greater extent than than chiliad words :). If you lot honey to larn yesteryear solving coding problems, hither are around of them to effort your hands.

Further Learning
The Coding Interview Bootcamp: Algorithms + Data Structures
Data Structures together with Algorithms: Deep Dive Using Java
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Write a programme to cheque if release is ability of ii (solution)
Write a programme to swap ii numbers without using tertiary variable (answer)
How to discovery middle chemical factor of linked listing inwards 1 pass? (solution)
How to discovery loop inwards linked list? (answer)

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