IntToStr converts integer to string.

IsValidDate checks if a string is a valid date in yyyy-mm-dd format.

IsValidEmail checks if an email address is valid.

IsValidPhoneNumber checks if a string is a valid phone number.

IsValidTime checks if a string is a valid time in HH:MM:SS format.

IsValidUUID checks if a string is a valid UUID (version 4).

RendInt return a random integer from the range[0,n].

RemoveSliceDuplicates revomes the duplicate elements in a slice.

RemoveSliceElement removes a particular element in a slice based on index.

StrToInt converts string to integer return in a val, err format.