Negative Indexing and Length | Variables and Types
Introduction to Python

# Negative Indexing and Length

You can also index from the end of the string. In this case, the last element has an index of `-1`, the second-to-last is `-2`, and so on.

Note

Keep in mind that `-1` is the go-to way to access the last element.

Now that you're familiar with referencing characters in a string, you might wonder how to determine the total number of characters in that string. Fortunately, Python provides the `len()` function for that. Just pass the string or the variable holding the string as an argument.

As you might notice, the length of a string corresponds to the number of characters in it. Thus, the total count of characters in a string is always one greater than the index of its last character. For instance, if the length of a string is `10`, the index of its last character is `9`.

Note

You can also determine the index of the last character by using `len(string) - 1`.

For the string `test` provided below, identify the character at index `-4`.

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Seção 2. Capítulo 9

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Introduction to Python

# Negative Indexing and Length

You can also index from the end of the string. In this case, the last element has an index of `-1`, the second-to-last is `-2`, and so on.

Note

Keep in mind that `-1` is the go-to way to access the last element.

Now that you're familiar with referencing characters in a string, you might wonder how to determine the total number of characters in that string. Fortunately, Python provides the `len()` function for that. Just pass the string or the variable holding the string as an argument.

As you might notice, the length of a string corresponds to the number of characters in it. Thus, the total count of characters in a string is always one greater than the index of its last character. For instance, if the length of a string is `10`, the index of its last character is `9`.

Note

You can also determine the index of the last character by using `len(string) - 1`.

For the string `test` provided below, identify the character at index `-4`.

Selecione a resposta correta

Tudo estava claro?

Seção 2. Capítulo 9