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Unlike many other programming languages, you can output code in R without using a print function:

Example

"Hello World!"
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However, R does have a print() function available if you want to use it. This might be useful if you are familiar with other programming languages, such as Python, which often uses the print() function to output code.

Example

print("Hello World!")
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And there are times you must use the print() function to output code, for example when working with for loops (which you will learn more about in a later chapter):

Example

for (x in 1:10) {
  print(x)
}
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Conclusion: It is up to you whether you want to use the print() function to output code. However, when your code is inside an R expression (for example inside curly braces {} like in the example above), use the print() function to output the result.