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Basic Data Types

Numbers Challenge 1: Mathematical Calculations Solution Review: Mathematical Calculations Challenge 2: Check Parity of a Number Solution Review : Check Parity of a Number Challenge 3: Find Values Within a Range Solution Review: Find Values Within a Range Strings Challenge 4: String Transformation Solution Review: String Transformation Challenge 5: Find Index of a Specific Value in a String Solution Review: Find Index of a Specific Value in a String Challenge 6: Lowercase to Uppercase Solution Review: Lower To Uppercase Quick Quiz on Basic Data Types

Lists

Lists Challenge 1: Sublist of a List Solution Review: Sublist of a List Challenge 2: Appending Value to the End of a List Solution Review: Appending Value to the End of a List Challenge 3: Averaging Values in a List Solution Review: Averaging Values in a List Challenge 4: Remove Sublist From List Solution Review: Remove Sublist From List List Comprehension Challenge 5: List of Squares Solution Review: List of Squares Challenge 6: List of Cubes Solution Review: List of Cubes Challenge 7: Lists of Even and Odd Numbers Solution Review: Lists of Even and Odd Numbers Challenge 8: Sum of Squares of Even Numbers Solution Review: Sum of Squares of Even Numbers Challenge 9: Even Squares Not Divisible By Three Solution Review: Even Squares Not Divisible By Three Quick Quiz on Lists

Modules and Functions

Modules and Functions Challenge 1: Greatest Common Divisor Solution Review: Greatest Common Divisor Challenge 2: Calculate Sine, Cosine, and Tangent of User Input Solution Review: Calculate Sine, Cosine and Tangent of User Input Challenge 3: Compute & Return Maximum Solution Review: Compute & Return Maximum Challenge 4: Check If a Number Is Divisible by Another Solution Review: Check if a Number is Divisible by Another Recursion Challenge 5: Compute nth Fibonacci Number Solution Review : Compute nth Fibonacci Number Challenge 6: Compute Sum of First 'n' Natural Numbers Solution Review: Compute Sum of First n Natural Numbers Quick Quiz on Modules and Functions

Iteration & Loops

Iteration & Loops

Challenge 1: Sum Elements of a List

Solution Review: Sum Elements of a List

Challenge 2: Find Maximum in a List

Solution Review: Find Maximum in a List

Challenge 3: Reverse a List

Solution Review: Reverse a List

Challenge 4: Check If List Is Sorted

Solution Review: Check If List Is Sorted

Challenge 5: Find Duplicates in a List

Solution Review: Find Duplicates in a List

Challenge 6: Print Even/Odd Numbers in Descending Order

Solution Review: Print Even/Odd Numbers in Descending Order

Quick Quiz on Iteration & Loops

Dictionaries

Dictionaries Challenge 1: Determine Size of a Dictionary Solution Review : Determine Size of a Dictionary Challenge 2: Average of Values of Keys in a Dictionary Solution Review : Average of Values of Keys in a Dictionary Challenge 3: Return Key With Maximum Value Solution Review : Return Key With a Maximum Value Challenge 4: Increment Dictionary Values Solution Review: Increment Dictionary Values Challenge 5: Size of a Dictionary Within a Dictionary Solution Review: Size of a Dictionary Within a Dictionary Challenge 6: Average Values Within Multiple Dictionaries Solution Review: Average Values Within Multiple Dictionaries Challenge 7: Keys Matching in Multiple Dictionaries Solution Review: Keys Matching in Multiple Dictionaries Quick Quiz on Dictionaries

Classes

Classes Challenge 1: Implement a Rectangle Class Solution Review: Implement a Rectangle Class Challenge 2: Implement Getter Methods Solution Review: Implement Getter Methods Challenge 3: Implement Area and Perimeter Member Methods Solution Review: Implement Area and Perimeter Methods Challenge 4: Implement a Print Method Solution Review: Implement a Print Method Inheritance Multi-Level Inheritance Multiple Inheritance Super Method Challenge 5: Inheritance Solution Review: Inheritance Quick Quiz on Classes

Iterators

Iterators Challenge 1: Return Even Numbers From 1 to n Solution Review: Return Even Numbers From 1 to n Challenge 2: Return Numbers From n Down to 0 Solution Review: Return Numbers From n to 0 Challenge 3: Return Sequence of Fibonacci Numbers Solution Review: Return Sequence of Fibonacci Numbers

Generators

Generators Challenge 1: Yield Odd Numbers From 1 to n Solution Review: Yield Odd Numbers From 1 to n Challenge 2: Yield Numbers From n Down to 0 Solution Review: Yield Numbers from n Down to 0 Challenge 3: Yield Fibonacci Sequence From 1st to Nth Number Solution Review: Yield Fibonacci Sequence From 1st to Nth Number

Asynchronous Programming

Asynchronous Programming Components of an Asynchronous Code Execute Single and Multiple Tasks Challenge 1: Implement an Asynchronous Function Solution Review: Implement an Asynchronous Function Challenge 2: Multiple Asynchronous Calls Solution Review: Multiple Asynchronous Calls Quick Quiz on Asynchronous Programming

Solution Review: Find Duplicates in a List

This lesson will help find duplicates in a list.

We'll cover the following

Solution: Use a Nested for Loop

Solution: Use a Nested `for` Loop

Use a nested for loop where you have to check for duplicates on the rest of the list for each value.

The outer loop selects one element and checks for duplicates over the list–through the inner–loop by comparing values.
If a duplicate is found, it sets the flag to true.

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