R Program to Take Input From User
In this example, you’ll learn to take input from a user using readline() function.
To understand this example, you should have the knowledge of following R programming topics:
When we are working with R in an interactive session, we can use
readline() function to take input from the user (terminal).
This function will return a single element character vector.
So, if we want numbers, we need to do appropriate conversions.
Example: Take input from user
my.name <- readline(prompt="Enter name: ") my.age <- readline(prompt="Enter age: ") # convert character into integer my.age <- as.integer(my.age) print(paste("Hi,", my.name, "next year you will be", my.age+1, "years old."))
Enter name: Mary Enter age: 17  "Hi, Mary next year you will be 18 years old."
Here, we see that with the
prompt argument we can choose to display an appropriate message for the user.
In the above example, we convert the input age, which is a character vector into integer using the function
This is necessary for the purpose of doing further calculations.