Calculator

y = 0
x = 0
z = 0
def add(x,y):
    z = x+y
    return z

def subtract(x,y):
    z = x-y
    return z

def multiply(x,y):
    z = x*y
    return z

def divide(x,y):
    z = x/y
    return z

def power(x,y):
    z = x**y
    return z

def root(x):
    z = x**0.5
    return z

x = input("First number of operation")
x = float(x)

operations = input("What operation would you like to use? Your choices are: Add, Subtract, Multiply, Divide, Power, Root")
operations = operations.lower()
if operations == "root":
    ans = root(x)
else:
    y = input("What is the second number of the operation?")
y = float(y)
if operations == "add":
    ans = add(x,y)
if operations == "subtract":
    ans = subtract(x,y)
if operations == "multiply":
    ans = multiply(x,y)
if operations == "divide":
    ans = divide(x,y)
if operations == "power":
    ans =power(x,y)

print(ans)