infix or prefix notation.- operator when used in infix notation denotes subtraction (2 - 1 # == 1) whereas with prefix notation gives negation (-1 # == -1).infix notation unless stated otherwise.+infix)1 + 2 # == 3prefix)+1-infix)2 - 1 # == 1prefix)-1*2 * 3 # == 6/5 / 2 # == 2.5//5 // 2 # == 2%5 % 2 # == 1==1 == 1 # true!=1 != 1 # falseis== will check if two objects have the same value, is will check if they are the exact same object (i.e. two variables reference the same object, etc.)true is true # truenotnot false # trueandtrue and 1 == 1 # trueortrue or false # true<2 < 3 # trueDog < Animal>2 > 3 # false<=3 <= 3 # true>=3 >= 3 # true=let x: int = 3->def test() -> int = return 3