course content

Course Content

Introduction to Python

1. First Acquaintance

The Very First StepsCommentsSome Simple MathMore Challenging MathChallengeBringing It All Together

2. Variables and Types

Storing NumbersNaming RulesUsing VariablesData TypesNumbersChallengeStoring TextString IndexingNegative Indexing and LengthString SlicingChallengeConcatenation

3. Conditional Statements

Boolean Data TypeChallenge: Comparison OperatorsCombining ConditionsChallenge: Logical OperatorsMembership Operators and Types ComparisonSimple if/else ExpressionsChallenge: Grocery StoreChallenge: Odd and Evenif/elif/else ExpressionsChallenge: Grocery Store 2Challenge: Positive, Negative or Zero

4. Other Data Types

What Is a List?List MethodsChallengeNested ListsChallengeWhat Is a Tuple?Tuple MethodsChallengeNested TuplesChallengeWhat Is a Dictionary?ChallengeDictionary MethodsChallenge

5. Loops

while LoopChallengefor LoopChallengeRangeChallengeIterating Over IndexesNested Loops

6. Functions

Built-in FunctionsChallengeDefining Your First FunctionChallengeif/else Statements in FunctionsChallengeFunctions With No ReturnChallengeModifying FunctionsChallengeLambda FunctionsChallenge

Introduction to Python

String IndexingString Indexing

Suppose we have a string. Let's delve into how to work with it. First up, let's understand how to access specific characters within a string.

To access a specific character in a string, use square brackets with an index number inside. Remember, the index number is not the actual position of the character because indexing in Python starts at 0. Consider the example below for clarity.

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In Python, the index is always one less than the actual position. For instance, we can retrieve several letters from the word in the example above.

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Let's say you're given the string test (as shown below). Identify the character that corresponds to the index 6.

Select the correct answer

Everything was clear?

Section 2. Chapter 8