In computer science , a syntax error refers to an error in the syntax of a sequence of characters or tokens that is written in a particular programming language . [one]
In compiled programming languages, syntax errors are detected strictly at compile time. The program will not compile until all syntax errors have been fixed. For interpreted programming languages , however, not all syntax errors can be detected at run time and they may not necessarily be syntactic, but also logical ; in many programs, such errors are never detected.
On 8-bit home computers that used the BASIC interpreter as the main user interface, the SYNTACTIC ERROR message was obscure, as it was a reaction to any user input that the interpreter could not parse.
A syntax error may occur if the equation is incorrectly entered in the calculator . This can be caused, for example, by opening the brackets without closing them, or, less commonly, by entering several decimal separators in a row.
The compiler sets a flag in the line where the syntax error is made.
In Java, the syntax is correct:
System.out.println ("Hello World");
And this one is not:
System.out.println (Hello World);
In C ++, the syntax is correct:
std :: cout << "Hello, World";
And this one is not:
std :: cout << Hello, World;