How to Take User Input for Salaries and Check for Duplicates in Python

Learn how to create a Python program that collects employee salaries, stores them in a list, and uses loops and conditional statements to determine if there are duplicate salaries. Perfect for beginners!
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This video is based on the question https://stackoverflow.com/q/70639136/ asked by the user 'Ruben Lozano' ( https://stackoverflow.com/u/17868662/ ) and on the answer https://stackoverflow.com/a/70641236/ provided by the user 'LunaticXXD10' ( https://stackoverflow.com/u/16067738/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Introduction

Have you ever wanted to write a program that takes input, processes that input, and checks for duplicate values? This is a common task in programming and can be particularly useful in various applications, such as managing employee data. In this guide, we'll walk through how to create a simple Python program that collects three employees' salaries, stores them in a list, and checks if any of the salaries are the same.

The Problem

You may find yourself in a situation where you need to input data (like salaries) and determine if any two values are equal. A beginner recently encountered this challenge while trying to create a program that checks if three employees share the same salary. They used loops and conditional statements but found their attempts unsuccessful. Let’s break down the solution to help you learn from their experience.

The Solution

We will create a Python script that follows these steps:

Get User Input: Ask the user to input salaries for three employees.

Store the Input: Append these inputs to a list.

Check for Duplicates: Use conditional statements to determine whether two or more salaries are the same.

Step-by-Step Breakdown

Step 1: Get User Input

First, we define the maximum number of salaries (in this case, three), and create a counter to keep track of how many salaries have been entered.

[[See Video to Reveal this Text or Code Snippet]]

We then use a while loop to repeatedly ask for salary input until we reach the maximum number:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Store the Input

Each salary is appended to LIST_SAL, which is a list that holds all the salaries entered by the user. After three inputs, we print the salaries for verification:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Check for Duplicates

We need to determine if any salary appears more than once in the list. This is done using a for loop and the count() method:

[[See Video to Reveal this Text or Code Snippet]]

Explanation:

We iterate over each salary in LIST_SAL.

The count() method checks how many times each salary appears. If it appears more than once, we print that there are duplicate salaries.

The break statement is used to exit the loop after finding the first instance of a condition, making the output clearer by avoiding multiple prints.

Conclusion

We’ve created a simple yet effective program that allows users to input employee salaries, store them in a list, and check for duplicates. Here’s the full code for your reference:

[[See Video to Reveal this Text or Code Snippet]]

Feel free to modify and experiment with this code as you continue your programming journey! Remember, practice is key. Happy coding!

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