4. Truth Tables
There is a lot to learn about the logic branch of mathematics, but we can selectively learn some of it to improve our algorithmic thinking when programming.
Below are truth tables for the comparison operator ==, and each of the logic operators and
, or
, and not
. While you may be able to reason them out, it can also be helpful to work to memorize them as that can make your programming decision-making process quicker.
| x |
== |
y |
Returns |
| True |
== |
True |
True |
| True |
== |
False |
False |
| False |
== |
True |
False |
| False |
== |
False |
True |
AND Truth Table
| x |
and |
y |
Returns |
| True |
and |
True |
True |
| True |
and |
False |
False |
| False |
and |
True |
False |
| False |
and |
False |
False |
OR Truth Table
| x |
or |
y |
Returns |
| True |
or |
True |
True |
| True |
or |
False |
True |
| False |
or |
True |
True |
| False |
or |
False |
False |
NOT Truth Table
| not |
x |
Returns |
| not |
True |
False |
| not |
False |
True |
Truth tables are common mathematical tables used in logic, and are useful to memorize or keep in mind when constructing algorithms (instructions) in computer programming.