In this core java programming tutorial we will Write a program to find GCD (or HCF) of Two Numbers In Java.
Contents of page >
- Full Program/SourceCode / Example 1 to find GCD (or HCF) of Two Numbers In Java
- Full Program/SourceCode / Example 2 to find GCD (or HCF) of Two Numbers In Java
- Full Program/SourceCode / Example 3 to find GCD (or HCF) of Two Numbers RECURSIVELY In Java
Example 1>
Enter first number :
21
Enter second number :
14
GCD of 21 and 14 is =
7
Example 2>
Enter first number :
42
Enter second number :
28
GCD of 42 and 28 is =
14
Example 3>
Enter first number :
65
Enter second number :
39
GCD of 65 and 39 is =
13
Full Program/SourceCode / Example 1 to find GCD (or HCF) of Two Numbers In Java >
import java.util.Scanner;
/*
* Write a program to find GCD (or HCF) of Two Numbers In Java
* GCD means Greatest common divisor
* HCF means highest common factor
*/
public class GCDOfTwoNumbersInJavaExample {
public static void main(String args[]) {
Scanner scanner = new Scanner(System.in);
System.out.println("Enter first number : ");
int firstNumber = scanner.nextInt();
System.out.println("Enter second number : ");
int secondNumber = scanner.nextInt();
System.out.println("GCD of " + firstNumber + " and " + secondNumber
+ " is = ");
/*
* Now we will calculate GCD (or HCF) of Two Numbers In Java
*/
int remainder;
//Use while loop to find GCD (or HCF)
while (secondNumber != 0) {
remainder = firstNumber % secondNumber;
firstNumber = secondNumber;
secondNumber = remainder;
}
System.out.println(firstNumber);
}
}
/*OUTPUT
Enter first number :
18
Enter second number :
12
GCD of 18 and 12 is = 6
*/
|
Full Program/SourceCode / Example 2 to find GCD (or HCF) of Two Numbers In Java >
import java.util.Scanner;
/*
* Write a program to find GCD (or HCF) of Two Numbers In Java
*/
public class GCDOfTwoNumbersInJavaExample2 {
public static void main(String args[]) {
Scanner scanner = new Scanner(System.in);
System.out.println("Enter first number : ");
int firstNumber = scanner.nextInt();
System.out.println("Enter second number : ");
int secondNumber = scanner.nextInt();
System.out.println("GCD of " + firstNumber + " and " + secondNumber
+ " is = ");
/*
* Now we will calculate GCD (or HCF) of Two Numbers In Java
*/
//USe while loop to find GCD (or HCF)
while (firstNumber != secondNumber) {
if (firstNumber > secondNumber)
firstNumber = firstNumber - secondNumber;
else
secondNumber = secondNumber - firstNumber;
}
System.out.println(firstNumber);
}
}
/*OUTPUT
Enter first number :
18
Enter second number :
12
GCD of 18 and 12 is = 6
*/
|
Full Program/SourceCode / Example 3 to find GCD (or HCF) of Two Numbers RECURSIVELY In Java
import java.util.Scanner;
/*
* Write a program to find GCD (or HCF) of Two Numbers recursively In Java
*/
public class GCDOfTwoNumbersRecursivelyInJava {
public static void main(String args[]) {
Scanner scanner = new Scanner(System.in);
System.out.println("Enter first number : ");
int firstNumber = scanner.nextInt();
System.out.println("Enter second number : ");
int secondNumber = scanner.nextInt();
System.out.println("GCD of " + firstNumber + " and " + secondNumber
+ " is = " + findGCD(firstNumber, secondNumber));
}
/**
* Now this method will calculate GCD (or HCF) of Two Numbers In Java
*/
static int findGCD(int firstNumber, int secondNumber) {
// If in case second number becomes 0 then first number is gdf
if (secondNumber == 0) {
return firstNumber;
}
int remainder = firstNumber % secondNumber;
return findGCD(secondNumber, remainder);
}
}
/*OUTPUT
Enter first number :
18
Enter second number :
12
GCD of 18 and 12 is = 6
*/
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So, in this core java programming tutorial we wrote a program to find GCD (or HCF) of Two Numbers In Java.
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