What is the OR. for

Answer 1

With OR you check the operands from left and right.
n = 25

if n < 0 or n > 100:
print("%d is out of range [0-100]" % n)
else:
print("%d is between [0-100]" % n)

if the left operand returns True, then the right is not checked, and the code in the block is executed. If it's False, but the right is True, the code is executed. So, only if both operands are False, the code in the block is not executed.

Let 1 is True, 0 is False, then:
OR:
0 or 0 - 0
0 or 1 - 1
1 or 0 - 1
1 or 1 - 1

AND:
0 and 0 - 0
0 and 1 - 0
1 and 0 - 0
1 and 1 - 1

if n >= 0 and n <= 100:
print("%d is in range [0-100]" % n)
else:
print("%d is out of range [0-100]" % n)

Answer 2

OR means??
what's your doubt?