When grepl() should be used?

grepl() should be used for filtering rows in a data frame that contains a particular string.

Example: In this example, we have filtered rows based on the strength value 75.

R

library(dplyr) 
  
# creating a data frame 
df <- data.frame(Department = c('CSE', 'IT', 'ECE',  
                                'EE', 'ME'), 
                 Strength = c(80, 75, 75, 65, 70), 
                 Score = c(75, 70, 65, 60, 60)) 
  
# filter rows that contain the string 
# 75 in the Strength column 
df %>% filter(grepl(75, Strength))