fetch all rows with null values in dataframe or dataset - R

Question

How to fetch all rows with null values in dataframe or dataset? My dataset contains employee details with their information, some of the employees have null in email id. I need to fetch those id,and their details in the dataset.

Answer 1

Use below code - 

which(is.na(air))

is.na() will return a boolean value of whether a field value is null or not null.

which(is.na()) will return the row number where null or NA values are present.