Power implementation (any positive numbers)

maths/power.rb

@@ -0,0 +1,27 @@
+def power (number = 0, n = 1)
+  if number < 0 || n <0
+    return -1
+  end
+
+  if n == 0
+    return 1
+  elsif ((n%2)==0)
+    return power(number*number, n/2)
+  else
+    return number*power(number*number, n/2)
+  end
+
+end
+
+# Take a number and the exponent value from the user as input and output the the result of expression (number^n)
+print("Enter a positive integer value (base):")
+number = gets.chomp.to_i
+print("Now, enter a positive integer value (exponent):")
+n = gets.chomp.to_i
+
+result = power(number, n)
+if(result==-1)
+  puts "Sorry, Invalid Number! Negative number informed."
+else
+  print("The result of " + number.to_s + "^" + n.to_s + " is "+ result.to_s + "\n")
+end