trial

#create data frame
students <- data.frame(
  Name = c("Pema", "Neha", "Karma"),
  Marks = c(85, 90, 78),
  Grade = c("A", "A+", "B")
)

students

##    Name Marks Grade
## 1  Pema    85     A
## 2  Neha    90    A+
## 3 Karma    78     B

str(students)

## 'data.frame':    3 obs. of  3 variables:
##  $ Name : chr  "Pema" "Neha" "Karma"
##  $ Marks: num  85 90 78
##  $ Grade: chr  "A" "A+" "B"