Скачать или смотреть How to Fix Your JavaScript if Statement Error: Declaration or Statement Expected

Discover how to troubleshoot and resolve the common JavaScript error "Declaration or statement expected" in your `if` statements. Learn the essential points to correct your code.
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This video is based on the question https://stackoverflow.com/q/72685923/ asked by the user 'Abhishek yadav' ( https://stackoverflow.com/u/19173410/ ) and on the answer https://stackoverflow.com/a/72686020/ provided by the user 'Aman Sadhwani' ( https://stackoverflow.com/u/5996031/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Troubleshooting the "Declaration or Statement Expected" Error in JavaScript

JavaScript is an incredibly versatile language, but it can present challenges, especially for beginners. One common issue you might encounter is the dreaded "Declaration or statement expected" error, particularly when working with if statements. If you've faced this problem, you're not alone! In this guide, we'll break down the error and guide you on how to fix it.

Understanding the Problem

Let's take a look at the problematic code snippet:

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

Error Diagnosis

Upon examining the code, there are a few key issues that may be causing the "Declaration or statement expected" error:

Incorrect Keyword: The term constant is incorrect in JavaScript. The correct keyword to declare a constant is const.

Semicolons Before Blocks: The use of semicolons (;) right after the if and else if statements prematurely ends the statements, which means the associated code blocks execute irrespective of the conditions.

How to Fix the Code

Step 1: Declare Constants Properly

First, update the declaration of the bill variable from constant to const.

Step 2: Remove Unnecessary Semicolons

Next, remove the semicolons (;) that follow the if and else if conditions. This ensures that the blocks of code correctly associate with their respective conditions.

Revised Code

Here's the corrected version of the code:

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

Conclusion

By following these steps, you’ve corrected the JavaScript error that was blocking your code from running as intended. Remember to ensure proper syntax when writing JavaScript to avoid such common pitfalls. Happy coding!

If you have any further questions or coding challenges, feel free to reach out, and we can dive deeper into JavaScript troubleshooting together!