Accessing characters, whether they are single or multiple, is an essential skill for working with strings in any programming language. In Python, we do this by indexing and slicing the string. In this hands-on lab, we’ll go through writing some code to demonstrate that we understand how to use indexing and slicing by printing out different pieces of information about a string back to the user.
To feel comfortable completing this lab you’ll want to be familiar with the following:
* Working with string literals: Watch the “Strings and String Operators” video from the [Certified Entry-Level Python Programmer Certification] course.
* Indexing and slicing strings: Watch the “String Indexing and Slicing” video from the [Certified Entry-Level Python Programmer Certification] course.
* Printing to the screen: Watch the videos from the “Input and Output Operations” section of the [Certified Entry-Level Python Programmer Certification] course.
Successfully complete this lab by achieving the following learning objectives:
- Create the string-info.py Script and Take User Input
We want to be able to execute our script, so to begin create an empty script named
string-info.pywith a shebang and make it executable:
$ echo '#!/usr/bin/env python3.7' > string-info.py $ chmod +x string-info.py
Create a script that asks for user input, store it as the
messagevariable, and print a handful of lines to the screen. Let’s take the user input now.
- Print the First, Last, and Middle Characters from the User’s Input
- Print the first character from your string.
- Print the last character from your string.
- Print the middle characters from a string.
- Print the Even Index Characters and Odd Index Characters
- Print the even index characters of your string.
- Print the odd index characters of your string.
- Print the String in Reverse
- Reverse the order of your string and print it.