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Introduction to Python
course content

Course Content

Introduction to Python

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 ExtendedChallenge: 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

bookRange

If you're looking to loop through indices rather than the elements themselves, you'll want to get familiar with the range() function. range() produces a series of numbers and returns a range object. This function can accept 1, 2, or 3 positive number arguments.

When you provide just one argument, n, it returns all integers from 0 up to, but not including, n. For example, range(5) yields the numbers 0 through 4.


              
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# Range with one argument
for i in range(5):
  print(i, end = ' ')
copy

If you give the function two arguments, n and m, it returns all integers starting from n and going up to, but not including, m.

So, range(5, 10) will produce the numbers 5 through 9.


              
123

            
# Range with two arguments
for i in range(5, 10):
  print(i, end = ' ')
copy

When you provide three arguments, n, m, and s, it returns integers starting from n and ending before m, but incrementing by s.

For instance, range(10, 30, 5) will give you the numbers 10, 15, 20, 25.


              
123

            
# Range with three arguments
for i in range(10, 30, 5):
  print(i, end = ' ')
copy

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Section 5. Chapter 5
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