If Func Calc

print("""Enter the operation
    1) add
    2) subtract
    3) Multiply
    4) Divide
    5) Modulus""")

operation = int(input("Select your operation [1 to 5]: "))
x = float(input("Enter first number: "))
y = float(input("Enter second number: "))

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 modulus(a, b):
	return a % b


result = 0

if operation == 1:
	result = add(x, y)

elif operation == 2:
	result = subtract(x, y)

elif operation == 3:

	result = multiply(x, y)

elif operation == 4:
	result = divide(x, y)

elif operation == 5:
	result = modulus(x, y)
else:
	result = "None. REASON: Inavlid operation (Available option numbers are: 1 to 5)"

print('\nThe result is' ,result)

Run