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Power implementation (any positive numbers) #214

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Power implementation (any positive numbers) #214

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27 changes: 27 additions & 0 deletions maths/power.rb
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Original file line number Diff line number Diff line change
@@ -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