What is the differences between a logical error and syntax error?

Answer 1

Answer:

Syntax Error - Occurs when the code isn't formatted or typed correctly. i.e. In python, typing If instead of if because it only recognizes lowercase.

Logical Error - Occurs when there is a fallacy of reasoning. i.e. In python, typing if x < 0 and x > 5. Since a value can't be less than 0 and greater than 5, a logical error will occur.

Answer:

a) Syntax Error

Definition : An error cause by violation of the programming language used.

Symptoms : Code fails to compile (error message from compiler)

b) Logical Error

Definition : An error caused by violation of logic (range, comparison, etc.). This error will NOT crash the program.

Symptoms : Unexpected output

c) Runtime Error/Execution Error

Definition : Any error, normally logical error that cause the program to crash.

Symptoms : Program crashes.

Answer 2

syntax error:It is apper normally when you write the syntax of code wrong so the compiler not understand what you whant to do and the code in this case not work or run.* EXAMPLE*COUT>>HELLO WORLD; .........."WRONG"

COUT<<"HELLO WORLED"; ........"RIGHT"

logical error:It is a problem occure when you fail in logic of code in so we can said that the logic error is abug in aproblem that causes it to operte incorrectly but the program stop working it can prodyce incorrect dat that may not be immediatly recognizable "warning".*EXAMPLE*

Declear and initiaized many variables and don't use thim

it give you a warning but the code will run

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syntax error:It is apper normally when you write the syntax of code wrong so the compiler not understand what you whant to do and the code in this case not work or run.* EXAMPLE*COUT>>HELLO WORLD; .........."WRONG"

COUT<<"HELLO WORLED"; ........"RIGHT"

logical error:It is a problem occure when you fail in logic of code in so we can said that the logic error is abug in aproblem that causes it to operte incorrectly but the program stop working it can prodyce incorrect dat that may not be immediatly recognizable "warning".*EXAMPLE*

Declear and initiaized many variables and don't use thim

it give you a warning but the code will run

FACULITY OF COMPUTER AND INFORMATION CAIRO UNIVERSITY

Answer 3

A syntax error means that a language was used incorrectly: if you forget to put certain symbols in source code, the machine will not be able to read it. A logic error means though the language was used correctly, there was a misunderstanding: if you want a, where b=c+a and you give a = b-a instead of a = b-c, then you will get the wrong answer, but have used the correct language.

Answer 4

The compiler doesn't. A syntax error is the type of error a compiler will detect and tell you about. A logic error means that you made a mistake in implementing your algorithm, and you won't notice it until you decide to test your program to make sure it's working as expected.

Answer 5

Syntax errors are compile time errors while logic errors are runtime errors. A syntax error is essentially a statement that makes no sense to the compiler, such that the program will not compile. This could be something as simple as a typo, but can be anything that breaks the language "grammar", such as using a type that has not yet been defined or using a variable that has not yet been declared.

A logic error is a runtime error that causes the program to misbehave, producing errant output. There are many causes of runtime errors, but ultimately it is simply a breakdown in your logic or reasoning. Programs often contain assumptions, but it pays to always test those assumptions with assertions, preferably with static assertions which can be tested at compile time. In this way you not only test your logic, you also document your reasoning, which leads to cleaner and more readable code. Never use a comment to demonstrate your logic because compilers simply do not understand comments (they are ignored). Also, if a function or class may throw an exception, always assume that it will throw that exception and handle it accordingly.

Answer 6

A syntax error is an error in your code which the compiler (or pre-compiler) cannot parse. It is a type of compile time error.

If your program compiles without error and an issue appears at run time (such as a bad upwards polymorphic cast) that prevents the program from continuing that is a run time error.

Answer 7

Syntax errors occur at compile time. Logic errors occur at runtime.