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nagamalli tadikondanagamalli tadikonda 

error or exception

what are the error or exception faced while implementing project
SandhyaSandhya (Salesforce Developers) 
Hi,

If I understood properly  you are asking about exceptions in salesforce.

An exception denotes an error that disrupts the normal flow of code execution. You can use Apex built-in exceptions or create custom exceptions. All exceptions have common methods.

Please refer below link.

https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/apex_classes_exception_methods.htm
 
Hope this helps you!

If this helps you please mark it as solved.

Thanks and Regards
Sandhya