Java gcd gcd(long a, long b)

Description

gcd

License

Open Source License

Declaration

public static long gcd(long a, long b) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

public class Main {
    public static long gcd(long a, long b) {
        long r = b;
        while (b > 0) {
            r = b;//w  w  w  .j a v  a  2s .  c o  m
            b = a % b;
            a = r;
        }
        return r;
    }

    public static long gcd(long[] a) {
        if (a.length == 1) {
            return a[0];
        } else {
            long gcd = 1;
            for (int i = 0; i < a.length; i++) {
                if (i == 0) {
                    gcd = gcd(a[i], a[i + 1]);
                } else {
                    gcd = gcd(a[i], gcd);
                }
            }
            return gcd;
        }
    }
}

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