| Name | Syntax | Example | Description |
|---|
\n"," | Equal | == | x == y | Tests if values are equal |
\n"," | Not equal | != | x != y | Tests if values are not equal |
\n"," | Greater than | > | x > y | Tests is a value is greater than another |
\n"," | Less than | < | x < y | Tests is a value is less than another |
\n"," | Greater than or equal to | >= | x >= y | Tests if a value is greater than or equal to another |
\n"," | Less than or equal to | <= | x <= y | Tests if a value is less than or equal to another |
\n","
\n"," \n","For more on comparison operators in Python:\n","- [W3Schools, Python Comparison Operators](https://www.w3schools.com/python/gloss_python_comparison_operators.asp)\n","\n","- \"In mathematics and mathematical logic, Boolean algebra is the branch of algebra in which the values of the variables are the truth values true and false, usually denoted 1 and 0\" ([Wikipedia](https://en.wikipedia.org/wiki/Boolean_algebra))\n","\n","We've talked previously about the Boolean data type. The underlying `True`/`False` logic lets us test for specific conditions and then specify how our code will execute based on the truth value for those conditional statements.\n","\n","- \"You can evaluate any expression in Python, and get one of two answers, `True` or `False`. When you compare two values, the expression is evaluated and Python returns the Boolean answer\" ([W3Schools, Python Booleans](https://www.w3schools.com/python/python_booleans.asp))"],"metadata":{"id":"qEkriNZm6Wpv"}},{"cell_type":"markdown","source":["### Boolean Logic & Comparison Operators\n"," \n","We can use comparison operators with a `print()` statement to test whether a particular statement is `True` or `False`.\n"," \n","A couple Python examples:"],"metadata":{"id":"0nYH8NWt6h2K"}},{"cell_type":"code","source":["print(4 == 5) # returns false\n","print(6 < 10) # returns true"],"metadata":{"id":"BuUMWMq46ijc"},"execution_count":null,"outputs":[]},{"cell_type":"code","source":["# comparison operator using variables\n","x = 5\n","y = 6\n","\n","print(x > y) # returns false"],"metadata":{"id":"y-rMBc2O6jf0"},"execution_count":null,"outputs":[]},{"cell_type":"markdown","source":["### Comparison Operators & String Objects\n","\n","We can probably make intuitive sense of how these comparison operators would work for numeric values. But what about text characters or string objects?\n"," \n","Most programming languages treat the 26 characters in the English-language alphabet (`a-z`) as sequential values, where `a` is less than `b`, which is less than `c`, etc.\n","\n","When working with string objects that represent words or characters, comparison operators indicate positionality in the English-language alphabet.\n","\n","A few examples in Python:"],"metadata":{"id":"4bdZ5bPE6kfC"}},{"cell_type":"code","source":["print(\"apple\" > \"banana\") # returns false\n","\n","print(\"Ohio State\" > \"Notre Dame\") # returns true"],"metadata":{"id":"YtVgQA7N6lVy"},"execution_count":null,"outputs":[]},{"cell_type":"markdown","source":["### Logical Operators\n","\n","We can also compare or relate multiple conditions using logical operators: `and`, `or`, `not`\n","\n","- \"A logical operator is a symbol or word used to connect two or more expressions such that the value of the compound expression produced depends only on that of the original expressions and on the meaning of the operator. Common logical operators include AND, OR, and NOT.\" (Busbee and Braunschweig, \"[Logical Operators](https://press.rebus.community/programmingfundamentals/chapter/logical-operators/)\") \n","\t \n","For example, `5 < 6 and 6 < 7` evaluates whether `5 < 6` and `6 < 7` are true. This statement would return `True`.\n","\n","Another example: `5 < 6 or 6 > 7` evaluates whether `5 < 6` or `6 > 7` is true. This statement would return `True`.\n","\n","Logical operators in Python:\n"," \n","![](\"https://github.com/kwaldenphd/elements-of-computing/blob/main/book/images/ch1/pedmas.png?raw=true\")