Problem Statement

1Problem Description : Find the largest of three numbers. 
2
3Example 1 :  
4Input  : a = 3,  b = 7 and c = 4 
5Output : 7 
6Explanation : 7 is the largest number. 
7
8Example 2 : 
9Input  : a = 12, b = 1 and c = 7
10Output : 12 
11Explanation : 12 is the largest number. 

Algorithm

1Input : Three numbers a, b and c
2Step 1: Start 
3Step 2: Read number a 
4Step 3: Read number b 
5Step 4: Read number c
6Step 5: if a > b Goto Step 6, else Goto Step 7
7Step 6: if a > c Print a, else Print c
8Step 7: if b > c Print b, else Print c
9Step 8: Stop 
10Output : Largest number among a, b and c

Flow Chart

Code Implementation

1import java.util.Scanner;
2
3public class LargestOfThreeNumbers {
4
5  public static void main(String[] args) {
6    int a, b, c;
7    Scanner sc = new Scanner(System.in);
8
9    System.out.print("Enter a: ");
10    a = sc.nextInt();
11    System.out.print("Enter b: ");
12    b = sc.nextInt();
13    System.out.print("Enter c: ");
14    c = sc.nextInt();
15
16    if (a > b) {
17      if (a > c) {
18        System.out.printf("Largest Number is : %d \n", a);
19      } else {
20        System.out.printf("Largest Number is : %d \n", c);
21      }
22    } else {
23      if (b > c) {
24        System.out.printf("Largest Number is : %d \n", b);
25      } else {
26        System.out.printf("Largest Number is : %d \n", c);
27      }
28    }
29  }
30}

Output 1:

1Enter a : 27
2Enter b : 3
3Enter c : 7
4Largest Number is : 27

Output 2:

1Enter a: 5
2Enter b: 17
3Enter c: 8
4Largest Number is : 17