Javascript Argument Error

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JavaScript relies on parentheses to know where the function calls start and end. If you lose some of the syntax before a function is closed, you will encounter the message " Syntax error: missing) after argument list . Error

This guide explores the meaning of this error and why it is generated. We will look at an example of this problem so that you can learn what you need to know to resolve the problem

Syntax error:.) Missing after topic list

The "missing ) after the list of arguments "a message tells us that there is a syntax error in a function call .

This can occur if you add a comma at the end of a list of arguments that are not followed by another argument.

JavaScript expects another argument after every comma. If JavaScript cannot find another argument, the code cannot be parsed correctly, and the closing parenthesis will generate a syntax error.

Another potential cause for this solution is to enclose the comma needed for the arguments separated into a function within a string.

If this error occurs, carefully read the syntax in the code that the error points eur JavaScript to. Make sure that all parentheses match and that you used commas correctly in the function call.

An example scenario

We are going to write a program that calculates whether a student has passed or failed a test at school. To begin with, we define the grade obtained by a student and a message that we will print on the console to inform us if a student has passed or failed:

variable message "message" JavaScript understands a placeholder letter X. We’ll replace it with "passed" or "failed" later in our program

If a student’s score is above 53, they have taken the test. Otherwise, they failed.

Now that we have defined the grade level of our students, we can calculate whether or not they passed the test. To do this, we’ll use an if statement :

We use an if statement and another statement to assess whether a student passed or failed. If the if returns true, the value of "X" in our string "message" becomes "passed" otherwise, the value of "X" becomes " failed".

Now that we have written in the message that informs us if a student has passed the test or not, we can print this message in the JavaScript :

Let our code run and see what happens:

our code returns a syntax error.

JavaScript is unable to evaluate our code because we made a mistake in one of our function calls. We know this because there are argument lists in function calls

Let ’s take a look at our function calls.

While the second statement appears to be syntactically correct, the first contains an error. We added a comma in our first string instead of after our first string. Note the "X" statement in the first replace () call.

This makes our argument list to contain two values ‚Äã‚Äãthat appear one after the other. This is incorrect syntax. The arguments must be separated by a comma

To correct this error, we will pass the comma inside the "X". String outside the string:

We have moved the comma in the string. Let’s run our code and see if it works

Our code returns: "This student has passed his test"

Our code was executed successfully

Conclusion

"SyntaxError: missing) error after argument list"! is generated if a function call cannot be correctly evaluated. To correct this error, make sure your topics are formatted correctly . Make sure all arguments to the function call are separated by commas.

You now have the knowledge to correct this syntax error like an expert!

👻 Read also: what is the best laptop for engineering students?

We hope this article has helped you to resolve the problem. Apart from Javascript Argument Error, check other code Python module-related topics.

Want to excel in Python? See our review of the best Python online courses 2023. If you are interested in Data Science, check also how to learn programming in R.

By the way, this material is also available in other languages:



Olivia Jackson

Munchen | 2023-03-26

JavaScript is always a bit confusing 😭 Javascript Argument Error is not the only problem I encountered. Will use it in my bachelor thesis

Javier Ungerschaft

Texas | 2023-03-26

Thanks for explaining! I was stuck with Javascript Argument Error for some hours, finally got it done 🤗. Will use it in my bachelor thesis

Cornwall OConnell

Singapore | 2023-03-26

Simply put and clear. Thank you for sharing. Javascript Argument Error and other issues with test Python module was always my weak point 😁. I just hope that will not emerge anymore

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