Combining Conditions | Conditional Statements
Introduction to Python

# Combining Conditions

In Boolean logic, two fundamental operators are OR and AND. What do they represent?

The OR operator checks if either of the conditions is true and returns `True` if so; otherwise, it returns `False`.

The AND operator ensures both conditions are true before returning `True`. If not, it returns `False`. In Python, to combine conditions, use the `and` & `or` operators (always in lowercase).

For example:

• `condition1 and condition2` yields `True` only when both conditions are `True`;
• `condition1 or condition2` gives `True` if at least one condition is `True`.

Note

You can also chain more than two conditions using these operators. Employ parentheses to clarify the order of operations.

As an illustration, consider these conditions:

1. Whether `2` exceeds `1` and if `"bbb"` isn't the same as `"aaa"`;
2. If the character with index `2` in the string `"my string"` is either `"y"` or `"s"`.
Code Description
In the first line of code `2 > 1 and "bbb" != "aaa"` contains two conditions, connected by the `and` operator. The first condition `2 > 1` is true, as 2 is greater than 1. The second condition `"bbb" != "aaa"` is also true, because the strings "bbb" and "aaa" are not equal. Since both conditions are true and connected through `and`, the entire expression is evaluated as true.

In the second line `"my string"[2] == "y" or "my string"[2] == "s"` checks two conditions, connected by the `or` operator. The expression `"my string"[2]` refers to the third character of the string "my string", which is " ". The first condition `"my string"[2] == "y"` is false. The second condition `"my string"[2] == "s"` is also false. Therefore, since both conditions are false and they are connected through `or`, the overall expression is evaluated as false.

How should we interpret the outcomes? The initial `print()` issues a `True` response since both `2 > 1` and `"bbb" != "aaa"` hold true. The following `print()` yields `False` because the character at index `2` is neither `'y'` nor `'s'` (it's actually a space).

Note

If you wish to reverse a boolean value, employ the `not` operator. For instance, `not 1 == 1` results in `False` because `1 == 1` is `True`, and we've negated that to `False`.

What output does the subsequent code produce?

Selecciona la respuesta correcta

Code Description
`print(0 > 10 and 5 > 2)`: Outputs `False`, because although `5 > 2` is true, `0 > 10` is false. The `and` operator requires both conditions to be true, but since one of them is false, the whole expression is false.

`print(2*2 == 5 or 1+1 != 3)`: Outputs `True`, because `2*2 == 5` is false, but `1+1 != 3` is true. The `or` operator requires at least one of the conditions to be true for the whole expression to be true.

¿Todo estuvo claro?

Sección 3. Capítulo 3

Contenido del Curso

Introduction to Python

# Combining Conditions

In Boolean logic, two fundamental operators are OR and AND. What do they represent?

The OR operator checks if either of the conditions is true and returns `True` if so; otherwise, it returns `False`.

The AND operator ensures both conditions are true before returning `True`. If not, it returns `False`. In Python, to combine conditions, use the `and` & `or` operators (always in lowercase).

For example:

• `condition1 and condition2` yields `True` only when both conditions are `True`;
• `condition1 or condition2` gives `True` if at least one condition is `True`.

Note

You can also chain more than two conditions using these operators. Employ parentheses to clarify the order of operations.

As an illustration, consider these conditions:

1. Whether `2` exceeds `1` and if `"bbb"` isn't the same as `"aaa"`;
2. If the character with index `2` in the string `"my string"` is either `"y"` or `"s"`.
Code Description
In the first line of code `2 > 1 and "bbb" != "aaa"` contains two conditions, connected by the `and` operator. The first condition `2 > 1` is true, as 2 is greater than 1. The second condition `"bbb" != "aaa"` is also true, because the strings "bbb" and "aaa" are not equal. Since both conditions are true and connected through `and`, the entire expression is evaluated as true.

In the second line `"my string"[2] == "y" or "my string"[2] == "s"` checks two conditions, connected by the `or` operator. The expression `"my string"[2]` refers to the third character of the string "my string", which is " ". The first condition `"my string"[2] == "y"` is false. The second condition `"my string"[2] == "s"` is also false. Therefore, since both conditions are false and they are connected through `or`, the overall expression is evaluated as false.

How should we interpret the outcomes? The initial `print()` issues a `True` response since both `2 > 1` and `"bbb" != "aaa"` hold true. The following `print()` yields `False` because the character at index `2` is neither `'y'` nor `'s'` (it's actually a space).

Note

If you wish to reverse a boolean value, employ the `not` operator. For instance, `not 1 == 1` results in `False` because `1 == 1` is `True`, and we've negated that to `False`.

What output does the subsequent code produce?

Selecciona la respuesta correcta

Code Description
`print(0 > 10 and 5 > 2)`: Outputs `False`, because although `5 > 2` is true, `0 > 10` is false. The `and` operator requires both conditions to be true, but since one of them is false, the whole expression is false.

`print(2*2 == 5 or 1+1 != 3)`: Outputs `True`, because `2*2 == 5` is false, but `1+1 != 3` is true. The `or` operator requires at least one of the conditions to be true for the whole expression to be true.

¿Todo estuvo claro?

Sección 3. Capítulo 3