Logical operators¶

There are three logical operators: and, or, and not.
The semantics (meaning) of these operators is similar to their meaning in English.
For example, x > 0 and x < 10 is true only if x is greater than 0 and at the same time, x is less than 10.
n % 2 == 0 or n % 3 == 0 is true if either of the conditions is true, that is, if the number is divisible by 2 or divisible by 3.
In this case, one, or the other, or both of the parts has to be true for the result to be true.
Finally, the not operator negates a boolean expression, so not x > y is true if x > y is false, that is, if x is less than or equal to y.

x = 5
print(x > 0 and x < 10)

n = 25
print(n % 2 == 0 or n % 3 == 0)

(chp05_3)

Check your understanding

select-2-1: What is the correct Python expression for checking to see if a number stored in a variable x is between 0 and 5.