Notice: This page requires JavaScript to function properly.
Please enable JavaScript in your browser settings or update your browser.
Learn String Slicing and Concatenation | Variables and Types
Introduction to Python

bookString Slicing and Concatenation

String slicing and concatenation are essential techniques in Python for manipulating sequences of characters. By understanding how to slice and combine strings (concatenation), you can efficiently process text data, which is crucial in many programming contexts.

In the following video, Alex will demonstrate the practical applications of string slicing and concatenation. Watch closely, as these concepts are key to effective string manipulation:

String slicing allows you to extract substrings from a larger string by specifying the start and end indices. The syntax string[start:end] is used, where start is the index of the first character you want to include, and end is the index one past the last character you want to include. This technique is especially useful for breaking down and analyzing strings by parts.

Example Application

Let's take a closer look at how slicing works:

1234567
fruit = "Strawberries" # Slicing the string to get "Straw" # Remember, the 'w' is indexed at 4 but if we want to include it in the slice, we need to go up to 5 sliced_fruit = fruit[0:5] print("Sliced part:", sliced_fruit)
copy

Concatenation is the process of joining two or more strings end-to-end, forming a new string.

This is achieved using the + operator, making it straightforward to combine strings for various purposes, such as creating full sentences or generating formatted output.

Here's how you can concatenate strings to create a new string:

12345678
# Concatenating strings part1 = "Straw" part2 = "berry" new_word = part1 + part2 # "Strawberry" print("Concatenated word:", new_word) # If you want to separate the words with a space, you need to add " " between the two parts print(part1 + " " + part2) # "Straw berry"
copy
Task

Swipe to start coding

Work with a string that lists grocery items. Use slicing to extract certain words and create a clear message about where these items are located in the store.

What to Do

  1. You are given a string variable called grocery_items. It contains several grocery names written in one line.
    Example: "milk, eggs, cheese, bread, apples"

  2. Use string slicing to extract the following items from the string:

    • "milk" β†’ store it in a variable named dairy1
    • "cheese" β†’ store it in a variable named dairy2
    • "bread" β†’ store it in a variable named bakery1
  3. Use string concatenation (+) to build one sentence that mentions these items and their aisle number.

Output Requirements

Print the following message:
We have dairy and bakery items: <dairy1>, <dairy2>, and <bakery1> in aisle 5

Solution

Everything was clear?

How can we improve it?

Thanks for your feedback!

SectionΒ 2. ChapterΒ 6
single

single

Ask AI

expand

Ask AI

ChatGPT

Ask anything or try one of the suggested questions to begin our chat

Suggested prompts:

Can you explain more about how string slicing works with negative indices?

What happens if I omit the start or end index in a slice?

Can you show more examples of string concatenation with different separators?

close

Awesome!

Completion rate improved to 2.17

bookString Slicing and Concatenation

Swipe to show menu

String slicing and concatenation are essential techniques in Python for manipulating sequences of characters. By understanding how to slice and combine strings (concatenation), you can efficiently process text data, which is crucial in many programming contexts.

In the following video, Alex will demonstrate the practical applications of string slicing and concatenation. Watch closely, as these concepts are key to effective string manipulation:

String slicing allows you to extract substrings from a larger string by specifying the start and end indices. The syntax string[start:end] is used, where start is the index of the first character you want to include, and end is the index one past the last character you want to include. This technique is especially useful for breaking down and analyzing strings by parts.

Example Application

Let's take a closer look at how slicing works:

1234567
fruit = "Strawberries" # Slicing the string to get "Straw" # Remember, the 'w' is indexed at 4 but if we want to include it in the slice, we need to go up to 5 sliced_fruit = fruit[0:5] print("Sliced part:", sliced_fruit)
copy

Concatenation is the process of joining two or more strings end-to-end, forming a new string.

This is achieved using the + operator, making it straightforward to combine strings for various purposes, such as creating full sentences or generating formatted output.

Here's how you can concatenate strings to create a new string:

12345678
# Concatenating strings part1 = "Straw" part2 = "berry" new_word = part1 + part2 # "Strawberry" print("Concatenated word:", new_word) # If you want to separate the words with a space, you need to add " " between the two parts print(part1 + " " + part2) # "Straw berry"
copy
Task

Swipe to start coding

Work with a string that lists grocery items. Use slicing to extract certain words and create a clear message about where these items are located in the store.

What to Do

  1. You are given a string variable called grocery_items. It contains several grocery names written in one line.
    Example: "milk, eggs, cheese, bread, apples"

  2. Use string slicing to extract the following items from the string:

    • "milk" β†’ store it in a variable named dairy1
    • "cheese" β†’ store it in a variable named dairy2
    • "bread" β†’ store it in a variable named bakery1
  3. Use string concatenation (+) to build one sentence that mentions these items and their aisle number.

Output Requirements

Print the following message:
We have dairy and bakery items: <dairy1>, <dairy2>, and <bakery1> in aisle 5

Solution

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

SectionΒ 2. ChapterΒ 6
single

single

some-alt