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By using this, you can pass multiple values as well in the form of array:-

// pass all the values in array and call findGCD function
    int findGCD(int arr[], int n) 
    { 
        int gcd = arr[0]; 
        for (int i = 1; i < n; i++) {
            gcd = getGcd(arr[i], gcd); 
}

        return gcd; 
    } 

// check for gcd
int getGcd(int x, int y) 
    { 
        if (x == 0) 
            return y; 
        return gcd(y % x, x); 
    }