Can anyone explain why the following code is not working? i am trying to make a calculator

Question

the following code keeps giving an error:

print("Python Calculator")

while True:
num1 = int(input("please enter first number: "))
opera = input("please enter operation(+, -, *, /): ")
num2 = int(input("please enter second number: ")
if opera == "+"
print("your total = " + str(num1 + num2))
print("-"*20)
elif opera == "-"
print("your total = " + str(num1 - num2))
print("-"*20)
else
print("syntax error")

Answer 1

You forgot the colon : after the if,elif and else statements.
if opera=='+':
print (..

Answer 2

yes but that gave an error as well, so when i did it without the colon it got an error at the print section