Bug

Bug can be defined as a software error in the software world. A bug can be an error, fault, or unexpected defect in a computer program or a hardware system.

What Is Debug?

Debug is the process of detecting or removing existing and potential errors that could cause a software's code to behave unexpectedly or crash when executed. We debug to prevent a software or system from malfunctioning. 

Error Debugging Process: 

1. Detect where the problem comes from in your software. Identify the error.
2. Capture the current view of the program when the error appears. Try to get all variable values and situations of the program during the error.
3. Analyze the current view according to situation and action. Try to find out the cause of the error. 
4. Fix the current error and check if any new error has occurred.

Types of Software Errors

There are commonly known types of errors in the field of software development. 

These are; functional errors, syntax errors, run-time errors, and logical errors. 

1. Functional Errors

This is a wide-ranging type of error that occurs when the software does not work as required. For example, if a user is working in a text editor, writes something and then clicks the "Save" button and if it is not saved, it's a functional error. 

2. Syntax Errors

Syntax errors are the typing errors you make in the codes you write during software development. If you are using an advanced code editor, for example visual studio code, it warns you when you make a syntax error. You can easily see and correct syntax errors, which are the most common type of error, at the moment they occur during software development. 

3. Run-Time Errors

Run-time errors are the errors that occur after you compile and run the code you wrote. Even though this type of error is not a syntax error, it occurs when the program gives an error during execution even though everything seems normal. 

4. Logical Errors

A logic error represents an error in the flow of a software. It causes the software to behave incorrectly. This type of error can cause a program to give an incorrect output, hang or crash the program. 

Unlike syntax errors, in logical errors, the program compiles but does not run correctly. An example of a logic error is when a block of code runs continuously, an infinite loop.

5. Interface Errors

Interface errors occur when there is no connection between how you intended your program to be used and how it is actually used. Most software follows standards. If the inputs your program has received do not match the program's standards, you may get an interface error. 

For example, if you have an API that requires setting certain parameters, and these parameters have not been set, an interface error can occur.