Read data file "Data$\_$with$\_$column$\_$names.csv$"$ using read.csv$()$ or read.table$()$ function.

Increment each value in column "Floor" by $1$ using For loop.

Increment each value of column "Area" by $1$ which are greater than $800,$ otherwise reduce their value by $1.$

Write the changed data frame back to csv file.

Upload the R script as solution.