Function Default value for argument in R

In R, by default, the arguments in a function have NULL as the default value. However, one can specify a default value for a parameter by assigning a value to it at the function definition.

Here is an example:

my_function <- function(a, b = 10) {
  result <- a + b
  return(result)
}

In the above function, b is assigned a default value of 10. This means that when the function is called, if the value for b is not specified, it will take the value of 10.

For example, if we call the function my_function with only one argument:

my_function(5)

In this case, b takes the default value of 10 and the output will be 15.

However, if we pass a value for b:

my_function(5, 7)

In this case, b takes the value 7 that we passed and the output will be 12.