Hello beginner! Welcome to the R programming world of Learn e Tutorials. Let's go through the basic topics of R once again. Because we are stepping towards programming we must have knowledge of basic syntax, input, output, and many more things.
Now we need to check what we have learned through these tutorials, for that like in any other language we will first try to get an output displayed in our terminal.
Displaying a required text on our screen is the first program we test in the programming language. There will be a text passing through an output function, it can be as a variable or direct as a string also. Some arguments will be given in these functions to help us format the strings to display on the screen. So we are going to print the string Hello World! through different methods in R.
We are using
cat() function for printing the String to the output screen. In this R program, use
cat() function to concatenate the strings together in case of more than one item.
print("Hello World!", quote = FALSE)
print() function will display the text without the double quotes(" ") because the argument
quote is given as false. By default it is true so the string will be printed inside the quotes, sometimes we don't require them so avoid it by setting the argument
quote = FALSE.
paste() function will concatenate the strings as one and print inside the quotes, it is mainly used to print variable values along with required text in programs.
cat("Welcome","to ","Learn","e","Tutorials !!!")
cat() is also used to display output text like
print(), it can be used directly to print variable values along with text, without using
paste() inside it.
STEP 1: Display the text "Hello World!" first using
STEP 2: Second time make quote = FALSE for suppressing Quotes in the output
STEP 3: Next print using the
paste() function to concatenate the strings together.
STEP 4: Another function
cat() is used for concatenate strings
# use the print() function print("Hello World!") # Quotes are suppressed print("Hello World!", quote = FALSE) # If there are more than 1 item,use paste() print(paste("Hi","Hello ","World")) # Concatenate strings and display without quotes cat("Welcome","to ","Learn","e","Tutorials !!!")
 "Hello World!"  Hello World!  "Hi Hello World" Welcome to Learn e Tutorials !!!