a = 10 assert a < 0 a = 10; b = 0; c = -1 if (c > 0 or b > 0 or a > 0) if (c > 0 and b > 0 and a > 0) What is the difference, how will the condition checks be performed?

In Python, logical operators or and and work with short-circuit evaluation:

• or returns True if at least one condition is true.
• and returns True only if all conditions are true.

In your example:

a = 10; b = 0; c = -1

if (c > 0 or b > 0 or a > 0):
    # condition is true because a > 0

if (c > 0 and b > 0 and a > 0):
    # condition is false because c and b are not greater than 0

The condition check proceeds from left to right and stops as soon as the result is determined:

• For or — at the first true condition
• For and — at the first false condition

Thus, in the first if, the check stops when it reaches a > 0 (true), and in the second — immediately at c > 0 (false).