The print() function will print out, or make visible in the output, any contents in the argument.

Example 1:
The print() function can be helpful for annotating code output. Put content in "quotations" to avoid error messages.
print("Analysis of Variance")
print("p = 0.02")
Example output:

Example 2:
You can also use the print() function to printout the contents of a data frame.
# print an entire data frame
print(MindsetMatters)
Example of output from running the code above (truncated):
# print a single column (variable) of a data frame
print(MindsetMatters$Age)
Example of output from running the code above: