Why output is 10?

Question

a=5
b=7
if not a!=b-2:
b=--a
print(a+b) #output=10 can you explain me why?

Answer 1

a=5
b=7

if not a! =

This means if a is equal

This is because there are two negatives:

not is a negative
! is the same as not so this is a negative

two negatives give a positive/oppostie

So if a is equal to

b-2 same as 5-2

which means 5

summarise it is saying

if a=5
if a is equal to 5

b=—a sama as b=5

print(a+b)

a is still 5
b is now 5

5+5 = 10

Answer 2

You should first try by printing values. Printing is the best Technic you should try when you not understand the code.

you are assgining b to value 5.

try to run below code, you will get idea.

a=5
b=7
print(-a)
print(--a)
if not a!=b-2:
b= --a
print(a,b)
print(a+b) #output=10 can you explain me why?

Answer 3

a = 5
b = 7-2 = 5
a+b
thats why