In this section, we will explore how to write a Java program that determines the largest of three numbers. Additionally, we will also examine the approach of using the ternary operator to find the largest of three numbers in Java.
Using Ternary Operator
Before we proceed with the program, let’s take a moment to familiarize ourselves with the ternary operator in Java.
The ternary operator is a component of Java’s conditional statement. It consists of three operands and is utilized to evaluate a Boolean expression, assigning a value based on the result. It can be employed as an alternative to an if-else statement. The syntax of the ternary operator is as follows:
variable_name = (expression) ? value if true:value if false
If the condition specified in the ternary expression is true, the value preceding the colon is assigned to the variable. Otherwise, the value following the colon is assigned to the variable.
We will now create a Java program that utilizes the ternary operator to compare three variables.
In the provided program, two ternary operators are used to compare three numbers.
LargestNumberExample.java
import java.util.Scanner;
public class LargestNumberExample
{
public static void main(String[] args)
{
int a, b, c, largest, temp;
//object of the Scanner class
Scanner sc = new Scanner(System.in);
//reading input from the user
System.out.println("Enter the first number:");
a = sc.nextInt();
System.out.println("Enter the second number:");
b = sc.nextInt();
System.out.println("Enter the third number:");
c = sc.nextInt();
//comparing a and b and storing the largest number in a temp variable
temp=a>b?a:b;
//comparing the temp variable with c and storing the result in the variable
largest=c>temp?c:temp;
//prints the largest number
System.out.println("The largest number is: "+largest);
}
}
Output:
Enter the first number: 23 Enter the second number: 11 Enter the third number: 67 Largest Number is: 67
To compare all three numbers in a single statement using the ternary operator, we can utilize the following expression.
d = c > (a>b ? a:b) ? c:((a>b) ? a:b);
LargestNumberExample1.java
import java.util.Scanner;
public class LargestNumberExample1
{
public static void main(String[] args)
{
int a, b, c, largest;
//object of the Scanner class
Scanner sc = new Scanner(System.in);
//reading input from the user
System.out.println("Enter the first number:");
a = sc.nextInt();
System.out.println("Enter the second number:");
b = sc.nextInt();
System.out.println("Enter the third number:");
c = sc.nextInt();
largest = c > (a > b ? a : b) ? c : ((a > b) ? a : b);
System.out.println("The largest number is: "+largest);
}
}
Output:
Enter the first number: 45 Enter the second number: 87 Enter the third number: 34 The largest number is: 87
Using if-else-if
LargestNumberExample2.java
public class LargestNumberExample2
{
public static void main(String[] args)
{
//initializing numbers to compare
int a=40, b=78, c=19;
//comparing numbers, a with b and a with c
//if both conditions are true, prints a
if(a>=b && a>=c)
System.out.println(a+" is the largest Number");
//comparing b with a and b with c
//if both conditions are true, prints b
else if (b>=a && b>=c)
System.out.println(b+" is the largest Number");
else
//prints c if the above conditions are false
System.out.println(c+" is the largest number");
}
}
Output:
78 is the largest number
Using nested if
LargestNumberExample3.java
public class LargestNumberExample3
{
public static void main(String[] args)
{
//initializing numbers to compare
int x = 1010, y = 170, z = 169;
if(x >= y)
{
if(x >= z)
//prints x, if the above two conditions are true
System.out.println("The largest number is: "+x);
else
//prints z, if the condition defined in inner if is true and the condition defined in inner if is false
//means x>y and x<z
System.out.println("The largest number is: "+z);
}
else
{
if(y >= z)
//prints y, if the condition defined in outer if is false and the condition defined in inner if is true
//means z>x and y>z
System.out.println("The largest number is: "+y);
else
//prints z, if the condition defined in both inner and outer loop is false
//z>x and z>y
System.out.println("The largest number is: "+z);
}
}
}
Output:
The largest number is: 1010
LargestNumberExample4.java
import java.util.Scanner;
public class LargestNumberExample4
{
public static void main(String args[])
{
int num1, num2, num3;
System.out.println("Enter three integers: ");
Scanner in = new Scanner(System.in);
num1=in.nextInt();
num2=in.nextInt();
num3=in.nextInt();
if (num1 > num2 && num1 > num3)
System.out.println("The largest number is: "+num1);
else if (num2 > num1 && num2 > num3)
System.out.println("The largest number is: "+num2);
else if (num3 > num1 && num3 > num2)
System.out.println("The largest number is: "+num3);
else
System.out.println("The numbers are same.");
}
}
Output 1:
Enter three integers: 12 110 9 The largest number is: 110
Output 2:
Enter three integers: 9 9 9 The numbers are same.
For additional learning resources, such as the Java program to find the GCD of two numbers, consider following tutorials.freshersnow.com.