My first function is a simple function that prints the message "Hello, world!" to the console a number of times indicated by the argument num. The function also returns the number of characters printed to the console.
The function is defined as follows:
f <- function(num) {
hello <- "Hello, world!\n"
for (i in seq_len(num)) {
cat(hello)
}
chars <- nchar(hello) * num
chars
}
The function has one argument, num, which specifies the number of times the message "Hello, world!" should be printed to the console. The default value for num is 1, so if the function is called without specifying the value of num, the message will be printed once.
The function body first creates a string variable called hello that contains the message "Hello, world!\n". The function then uses a for loop to print the message num times. The for loop iterates from 1 to num, and in each iteration, the message is printed to the console.
The function then calculates the number of characters in the message and multiplies that number by num. The result is the total number of characters printed to the console. The function then returns the number of characters.
To call the function, you can simply type the name of the function and pass the value of num as an argument. For example, to print the message "Hello, world!" twice, you would call the function as follows:
f(2)
This would print the message "Hello, world!" twice to the console and return the number 28, which is the total number of characters printed.
