🚀 Programming Example
Function with three dot ... parameter in R programming language
Function with three dot ... parameter in R programming language
# function argument as a three dot ...
hello.person <- function(firstName, lastName = "Ansari", ...)
{
print(sprintf("Hello %s %s", firstName, lastName))
}
# Azmi will ignore because of the ...
hello.person("Rumman", "Ansari", "Azmi")
# Azmi will ignore because of the ...
hello.person("Rumman", extra = "Azmi")
# another way to call
hello.person("Rumman")
hello.person(firstName = "Rumman")
hello.person(firstName = "Ansari", "Azmi")
# this function calling will not work
# because "firstName" is missing
hello.person(lastName = "Rumman")
> # Azmi will ignore because of the ...
> hello.person("Rumman", "Ansari", "Azmi")
[1] "Hello Rumman Ansari"
>
> # Azmi will ignore because of the ...
> hello.person("Rumman", extra = "Azmi")
[1] "Hello Rumman Ansari"
>
> # another way to call
> hello.person("Rumman")
[1] "Hello Rumman Ansari"
>
> hello.person(firstName = "Rumman")
[1] "Hello Rumman Ansari"
>
> hello.person(firstName = "Ansari", "Azmi")
[1] "Hello Ansari Azmi"
>
> # this function calling will not work
> # because "firstName" is missing
> hello.person(lastName = "Rumman")
Error in sprintf("Hello %s %s", firstName, lastName) :
argument "firstName" is missing, with no default
First understand the algorithm carefully. Then study the program line-by-line and compare it with the output. Finally, review the explanation section to strengthen your logic and programming understanding.
Rewrite the program without looking at the code. Modify values, conditions or logic and run it again. This helps improve confidence and strengthens coding skills much faster.