grepl() function in
R Language is used to return the value True if the specified pattern is found in the vector and false if it is not found.
Syntax: grepl(pattern, string, ignore.case=FALSE)
Parameters:
pattern: regular expressions pattern
string: character vector to be searched
ignore.case: whether to ignore case in the search. Here ignore.case is an optional parameter as is set to FALSE by default.
Example 1:
Output:
[1] TRUE TRUE FALSE FALSE
[1] TRUE TRUE TRUE TRUE
Example 2:
Output:
[1] FALSE TRUE FALSE FALSE
[1] FALSE FALSE TRUE TRUE
