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This module provides an introduction to the use of strings in Python.

Table of contents

Preface

This module is one in a collection of modules on Python designed for teaching ITSE 1359 Introduction to Scripting Languages: Python at Austin Community College in Austin, TX. It provides an introduction to the use of stringsin Python.

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Introduction to the string

The common interpretation of the word string in computer programming is that a string is a sequence of characters that is treated as a unit. For example, a person's first and last names are often treated as two differentstrings.

A person's first name usually consists of several characters and these characters are treated as a unit to produce a name.

Literals

Perhaps the best way to describe a literal is to describe what it is not.

A literal is not a variable. In other words, the value of a literal doesn't change with time as the program executes. You might say that it is taken at facevalue.

An expression using variables

For example, the following expression describes the sum of two variables named var1 and var2 :

sum = var1 + var2

The result of this expression can vary depending on the values stored in var1 and var2 at the instant in time that the expression is evaluated.

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Source:  OpenStax, Itse 1359 introduction to scripting languages: python. OpenStax CNX. Jan 22, 2016 Download for free at https://legacy.cnx.org/content/col11713/1.32
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