The method gcd(long a, long b) of Guava’s LongMath Class returns the greatest common divisor of two parameters a and b.
Syntax:
public static long gcd(long a, long b)
Parameters: This method accepts two parameters a and b of the long type of whose GCD is to be found.
Return Type: This method returns the largest positive long value that divides both of the parameters passed to the function.
Exceptions: The method gcd(long a, long b) throws IllegalArgumentException if a is negative or b is negative.
Note: If a and b both are zero, the method returns zero.
Example 1:
// Java code to show implementation of// gcd(long a, long b) method of Guava's// LongMath class import java.math.RoundingMode;import com.google.common.math.LongMath; class GFG { // Driver code public static void main(String args[]) { long a1 = 14; long b1 = 70; // Using gcd(long a, long b) method // of Guava's LongMath class long ans1 = LongMath.gcd(a1, b1); System.out.println("GCD of " + a1 + " and " + b1 + " is " + ans1); long a2 = 23; long b2 = 15; // Using gcd(long a, long b) method // of Guava's LongMath class long ans2 = LongMath.gcd(a2, b2); System.out.println("GCD of " + a2 + " and " + b2 + " is " + ans2); }} |
Output:
GCD of 14 and 70 is 14 GCD of 23 and 15 is 1
Example 2:
// Java code to show implementation of// gcd(long a, long b) method of Guava's// LongMath class import java.math.RoundingMode;import com.google.common.math.LongMath; class GFG { // Driver code public static void main(String args[]) { long a = -5; long b = 15; try { // Using gcd(long a, long b) method // of Guava's LongMath class // This should throw "IllegalArgumentException" // as a < 0 long ans = LongMath.gcd(a, b); } catch (Exception e) { System.out.println(e); } }} |
Output:
java.lang.IllegalArgumentException: a (-5) must be >= 0
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