Course Content

Introduction to Python

1. First Acquaintance

The Very First Steps Comments Some Simple Math More Challenging Math Challenge Bringing It All Together

2. Variables and Types

Storing Numbers Naming Rules Using Variables Data Types Numbers Challenge Storing Text String Indexing Negative Indexing and Length String Slicing Challenge Concatenation

3. Conditional Statements

Boolean Data Type Challenge: Comparison Operators Combining Conditions Challenge: Logical Operators Membership Operators and Types Comparison Simple if/else Expressions Challenge: Grocery Store Challenge: Odd and Even if/elif/else Expressions Challenge: Grocery Store 2 Challenge: Positive, Negative or Zero

4. Other Data Types

What Is a List?List Methods Challenge Nested Lists Challenge What Is a Tuple?Tuple Methods Challenge Nested Tuples Challenge What Is a Dictionary?Challenge Dictionary Methods Challenge

5. Loops

while Loop Challenge for Loop Challenge Range Challenge Iterating Over Indexes Nested Loops

6. Functions

Built-in Functions Challenge Defining Your First Function Challenge if/else Statements in Functions Challenge Functions With No Return Challenge Modifying Functions Challenge Lambda Functions Challenge

Introduction to Python

Range

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.

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.

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.

Everything was clear?

Section 5. Chapter 5