Java Guava | mod(long x, long m) of LongMath Class with Examples

The mod(long x, long m) method of Guava’s LongMath Class accepts two parameters x and m, and used to calculate the value of x modulus under m.

Syntax:

public static long mod(long x, long m)

Parameters: This method accepts two parameters x and m which are of long type to calculate x modulo m.

Return Value: The method returns x mod m that will be a non-negative value less than m.

Exception: The method mod(long x, long m) throws ArithmeticException if m <= 0.

Below examples illustrate the mod(long x, long m) method:

Example 1 :

 // Java code to show implementation of // mod(long x, long m) 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 x1 = -77;         long m1 = 4;            long ans1 = LongMath.mod(x1, m1);            // Using mod(long x, long m)         // method of Guava's LongMath class         System.out.println(x1 + " mod "                            + m1 + " is : " + ans1);            long x2 = 22;         long m2 = 6;            long ans2 = LongMath.mod(x2, m2);            // Using mod(long x, long m)         // method of Guava's LongMath class         System.out.println(x2 + " mod "                            + m2 + " is : " + ans2);     } }

Output:

-77 mod 4 is : 3
22 mod 6 is : 4

Example 2:

 // Java code to show implementation of // mod(long x, long m) method of Guava's // LongMath class import java.math.RoundingMode; import com.google.common.math.LongMath;    class GFG {        static long findMod(long x, long m)     {         try {             // Using mod(long x, long m)             // method of Guava's LongMath class             // This should throw "ArithmeticException"             // as m <= 0             long ans = LongMath.mod(x, m);                // Return the answer             return ans;         }         catch (Exception e) {             System.out.println(e);             return -1;         }     }        // Driver code     public static void main(String args[])     {         long x = 11;         long m = -5;            try {             // Function calling             findMod(x, m);         }         catch (Exception e) {             System.out.println(e);         }     } }

Output:

java.lang.ArithmeticException: Modulus must be positive

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