Question

What will the following code display? mystring \(=\) 'abcdefg' print (mystring \([3: 1)\)

Short answer

```python mystring = 'abcdefg' print(mystring[3:]) ``` Answer: The output of the given code will be 'defg'.

Step-by-step solution

Understand the given code

First, let's go through the given code to understand it: 1. A string variable `mystring` is assigned the value 'abcdefg'. 2. The `print` statement is used to display the output of `mystring[3:]`. This is called string slicing, where we want to extract a part of the string from a starting index (inclusive) to an ending index (exclusive).

Identify the slicing indexes

In this case, the starting index for string slicing is 3. The ending index is not specified, which means we want to extract the part of the string from the starting index until the end of the string.

Apply string slicing

Now, let's apply string slicing to find the output of the given code. 'abcdefg' can be represented with indexes as follows: | a | b | c | d | e | f | g | |---|---|---|---|---|---|---| | 0 | 1 | 2 | 3 | 4 | 5 | 6 | Since we want to slice the string from index 3 to the end of the string, the output will be the characters 'defg'.

Final Answer

Hence, the output of the given code will be 'defg'.

Key concepts

Python programming

Python is a versatile and user-friendly programming language known for its simple syntax and readability.
It is widely used in various domains, from web development to data analysis.
One of the features that make Python so accessible is its intuitive handling of strings, which includes a powerful tool known as string slicing.

• Python strings are a sequence of characters.
• Strings support a variety of operations such as slicing and indexing, which help in manipulating text easily.
• Python is dynamically typed, meaning variable types are determined at runtime.

Python programming encourages writing clean and logical code that is easy to understand and maintain. By learning Python, you gain skills that allow you to automate tasks, solve computational problems, and even design interactive applications.

slice notation

Slice notation is a technique in Python used to extract certain parts of sequences such as strings, lists, or tuples.
This operation is highly efficient and allows for quick retrieval of data.

• A slice is specified by a range of indices.
• The syntax follows the pattern `start:stop:step`, where `start` is the index to begin with and `stop` is the index to end at (exclusive).
• By default, `step` is 1, meaning it slices by every element.

For example, in the string 'abcdefg', using slice notation `mystring[3:]` would mean starting from index 3 and continue until the end of the string.
The absence of a `stop` index implies the slice will include all elements till the last one.
This gives you `defg` from 'abcdefg' by beginning at the character at index 3, which is 'd', and continuing through 'e', 'f', and finally 'g'.

indexing in Python

Indexing is a fundamental concept associated with data structures in Python like lists, tuples, and strings.
It allows direct access to individual elements based on their position in the sequence.

• Python uses zero-based indexing, meaning the first element is accessed with index 0.
• Each character or item in a sequence can be retrieved directly with its index.
• Negative indexing is also supported, where `-1` indicates the last element.

Understanding indexing is crucial when working with sequences as it provides a base for slicing and comprehensions.
For instance, in the string 'abcdefg', `mystring[3]` gets you 'd', because 'd' is the character at index 3.
This simple yet robust system allows you to navigate and manipulate your data efficiently in Python.