Ruby program to find the GCD using library function

print "Enter number1: ";
num1 = gets.chomp.to_i;  

print "Enter number2: ";
num2 = gets.chomp.to_i;  

result = num1.gcd(num2);

print "Greatest Common Divisor: ",result;

Output:

Enter number1: 12
Enter number2: 16
Greatest Common Divisor: 4