Syntax error near unexpected token then


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What is a Syntax Error?

A syntax error is an error in the use of the rules of a programming language. A syntax error means that the code you are trying to run cannot be parsed by the interpreter, meaning it is not valid code. Syntax errors are different from runtime errors, which occur while the code is running.

Types of Syntax Errors

Syntax errors can be divided into two distinct categories: parsing errors and compiler errors. Parsing errors are caused by incorrect use of the Python language, while compiler errors are caused by incorrect use of the interfaces between the Python interpreter and the underlying operating system.

Missing Semicolon

One of the most common syntax errors is forgetting to put a semicolon at the end of a statement. This can cause problems because the next line of code may be interpreted as part of the first line, leading to weird and unpredictable results.

Extra Semicolon

A semicolon is used as a statement terminator in most programming languages. In some cases, a semicolon may be omitted, such as when multiple statements are placed on the same line. However, an extra semicolon (;) is always a syntax error.

For example, the following C++ code will generate a syntax error because of the extra semicolon after the return statement:

int main()
return 0;; // <- this line contains an extra semicolon } If you get a “syntax error near unexpected token then” error, it means that you have forgotten to put a semicolon somewhere or that you have put an extra one.

Missing Parenthesis

A missing parenthesis is one of the most common syntax errors. This error can be caused by forgetting to include a closing parenthesis when it is needed, or by including an extra opening parenthesis when there is no corresponding closing parenthesis.

For example, the following code will produce a missing parenthesis error:

int x = (5 + 2) * 3;
int y = 5 + 2 * 3;

Assuming that the parentheses are meant to be used as shown in the first line of code, the error can be fixed by adding a closing parenthesis at the end of the line:

int x = (5 + 2) * 3;

Another way to fix this error is to remove the opening parentheses from the second line of code:

int x = (5 + 2) * 3;
int y = 5 + 2 * 3;

Extra Parenthesis

An extra parenthesis is a common syntax error that can occur when writing code. This happens when you have an extra ( or ) somewhere in your code that doesn’t match up with the rest of the parentheses. This can often be due to mistyping, or forgetting to close a parenthesis earlier in the code.

For example, take a look at the following code:

if (x > 10) {
console.log(“Big number!”);
} // <– extra } here!

This code will produce an error because there is an extra } at the end. This can be fixed by simply removing the extra }.

It’s important to be careful when using parentheses in your code, and to make sure that they all match up correctly. Otherwise, you may run into problems like this one.

How to Fix Syntax Errors

Syntax errors can be frustrating, but luckily there are ways to fix them. Syntax errors occur when the code you’re writing doesn’t conform to the rules of the programming language. This can happen because you forgot to close a quotation mark, or you forgot to put a comma between two items in a list. Luckily, most syntax errors are easy to fix.

Check for Missing Semicolons

One of the most common causes of the “syntax error near unexpected token then” error is simply a missing semicolon. When your Bash script reaches a line ending with then, it expects the next line to have some kind of command to execute. But if that next line just ends with a semicolon, like this:

echo “Hello, world!”;

Bash will see that as an incomplete command and throw a syntax error. To fix this, just add a semicolon after the then keyword:

echo “Hello, world!”;

Check for Extra Semicolons

To fix a syntax error, start by looking at the line of code where the error is pointing. In most cases, there will be another syntax error somewhere on that line. If you can’t find the error there, look at the lines before and after it for a missing semicolon or curly brace. In many cases, the problem is simply a matter of matching up your code correctly.

Check for Missing Parentheses

If you’re getting a “syntax error near unexpected token” error, the problem is usually that you’ve forgotten to close a parentheses or quote somewhere. Take a look at the line before the error to see if it’s missing a “)”:

If there’s no ) missing, then check for a missing “}” or “]”. These are usually caused by forgetting to close a curly brace or square bracket:

Check for Extra Parentheses

When you get a syntax error, the first thing to check is whether you have parentheses that don’t match up. This can happen if you lose track of where you are in the nested parentheses. For example, take a look at the following code:

(echo The total is $((total))

If you accidentally leave off the closing parenthesis, like this:

(echo The total is $((total))
you’ll get a syntax error. To fix it, just add the missing parenthesis at the end:

(echo The total is $((total)))


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