Merge pull request #2 from code4policy/new-functions

Added squaring, cubing, and square n times functions

Author: aullanisa

calculator.py

@@ -1,15 +1,31 @@
-def multiply(a,b):
-    return a * b
-
 def add(a,b):
 	return a+b
 
 def subtract(a,b):
 	return a-b
 
+def multiply(a,b):
+    return a * b
+
 def divide(a,b):
 	return a/b
 
+def square(a):
+	return a*a
+
+def cube(a):
+	return a*a*a
+
+def square_n_times(number, n):
+	if n < 0:
+		raise ValueError("n must be non-negative number")
+	total = 0
+	value = number
+	for _ in range(n):
+		value = value * value
+		total += value
+	return total
+
 print("I'm going use the calculator functions to multiply 5 and 6")
 x = multiply(5,6)
 print(x)