How this code works?

Question

x=3
b=7
b=--x
print(b) #ouput=3 but why can anyone explain this code that how is worked.

Answer 1

In Python :
increment or decrement are not allowed ...
so the b is assigned the value of x without decrement...

check out this link for more 👇
https://www.geeksforgeeks.org/g-fact-21-increment-and-decrement-operators-in-python/

Answer 2

b=--x means you assign a new value to variable b which is minus minus x = 3
b-=x means you decrement the value of b by x which is b-x=4