How will Python evaluate the following expression?

Q. How will Python evaluate the following expression?

(i) 20 + 30 * 40

(ii) 20 - 30 + 40

(iii) (20 + 30) * 40

(iv) 15.0 / 4 + (8 + 3.0)

Answer =

(i)
Since precedence of * operator is greater than + operator so in the given code it evaluate like:-

First step:- 30*40
Second step:- 1200 + 20
So for answer is 1220.

(ii)
Since precedence of - operator is equal to + operator so in the given code it evaluate like:-

First step:- -30 + 40 OR 20 - 30
Second step:- 10 OR -10
So for answer is 30

(iii)
Since precedence of parentheses is greater than * operator so in the given code it evaluate like:-

First step:- (50) * 40
Second step:- 50 * 40
So for answer is 2000.

(iv)
Since precedence of parentheses > / > + operator so in the given code it evaluate like:-

First step:- 15.0 / 4 + (11.0)
Second step:- 3.75 + (11.0)
So for answer is 14.75.