Error Vs Bug

Bug	Error
The unexpected output produced during run time is called as bug.	The irregularity in code which does no allows code to get compiled or build. The above defination of bug is not universal, it is interms of developers as far as coding perspective is considered. For e.g. an application runs on 3 database, 2 database are present on local PC while one of the database is installed on other PC in the network If the network is down the database cannot be accessed and will give error "Underlying provider failed" thus this error is technical hence error can be in many terms.
The application has a malfunction which is identified or discovered by developer can be said as bug.	Mistake done by developer during programming which may be syntactical or logical error.
Bug is a deviation when program compiles	Error is a deviation caused during programming
The defect accepted by developer is called bug ( The functionality not working as per the requirement is called defect )	Developer written code that does not executes